3M Personal Safety Division
3MTM SoundPro SE/DL SeriesSound Level Meters
SoundProUser Manual
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ii
Table of Contents
TABLE OF CONTENTS
Introduction..............................................................................................................1
Models and options..................................................................................................1
Frequency resolution...............................................................................................2
Octave bands.......................................................................................................................... 2
Naming bands......................................................................................................................... 3
Analysis type........................................................................................................................... 5
Logging explained....................................................................................................5
Physical Characteristics..........................................................................................5
The Display............................................................................................................................. 5
Hardware interfaces................................................................................................................ 6
Memory card slot............................................................................................................... 6
USB port............................................................................................................................ 6
Power jack......................................................................................................................... 7
Information screen...................................................................................................8
Detection Management Software DMS ...................................................................9
Getting Started .......................................................................................................11
Checking the equipment........................................................................................11
Microphone and accessories ................................................................................12
Class/Type 1 and Class/Type 2 instrument.......................................................................... 13
Providing power.....................................................................................................14
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Table of Contents
Checking or changing type .................................................................................................. 15
Turning on ..............................................................................................................18
Start screen and the keypad................................................................................................. 18
SoundPro functionality..........................................................................................19
The keypad explained........................................................................................................... 19
Indicators explained.............................................................................................................. 20
Turning off..............................................................................................................21
Basic setups...........................................................................................................23
C-A measurement settings.............................................................................................. 30
Logging...................................................................................................................31
Exceedance level.................................................................................................................. 31
Setting up display options.....................................................................................33
Advanced setups ...................................................................................................37
Auto-Run.................................................................................................................38
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Table of Contents
Setting up auto-run ................................................................................................38
Date setting........................................................................................................................... 38
Days of week setting............................................................................................................. 40
Auto-run shutdown screen.................................................................................................... 42
Auto-run shutdown screen explained.............................................................................. 42
Locking setup or run mode ...................................................................................46
Digital outputs/Triggering......................................................................................50
Communications....................................................................................................51
Mass Storage........................................................................................................................ 52
Preparing to measure & running...........................................................................57
Virtual meters .........................................................................................................57
Measurement notation (IEC/ISO)...........................................................................57
Preparing to measure ............................................................................................59
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Table of Contents
Measurement range.............................................................................................................. 60
Calibrate..................................................................................................................61
Calibration screen................................................................................................................. 61
Post-Calibration............................................................................................................... 61
Performing a calibration........................................................................................................ 62
Running a session/study.......................................................................................64
Measurement navigation .......................................................................................65
Using softkeys in measurement screens.............................................................................. 65
Measurement screen icons ...................................................................................67
Measurement screens............................................................................................68
Time History/Back-erase screen ...........................................................................72
Back-erasing...........................................................................................................72
RT60, Curves, and STI-PA .....................................................................................77
Additional options..................................................................................................77
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Table of Contents
Reverberation options........................................................................................................... 80
Reverberation results............................................................................................................ 83
Curves.....................................................................................................................87
Captured curves.....................................................................................................87
Running captured curves...................................................................................................... 90
Criterion curve families .........................................................................................91
Audiometric background curves...........................................................................94
Running and viewing curves.................................................................................96
Curve measurements and results......................................................................................... 96
Speech Intelligibility...............................................................................................98
STI-PA testing....................................................................................................................... 98
Common Intelligibility Scale (CIS)................................................................................... 99
Conducting a STI-PA test (overview of steps).................................................................... 100
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Table of Contents
Running a speech intelligibility study.................................................................................. 103
Applying captured curves for STI-PA testing...................................................................... 108
Files.......................................................................................................................111
Navigating in a session/config. directory....................................................................... 117
Communicating.................................................................................................... 121
Using an external card reader....................................................................................... 121
DMS and working with SoundPro data............................................................................... 122
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Table of Contents
DC output............................................................................................................................ 123
EMC emissions and immunity....................................................................................... 125
Bandwidth...................................................................................................................... 127
Instrument noise............................................................................................................ 128
Temperature.................................................................................................................. 128
Languages..................................................................................................................... 129
Input/output.......................................................................................................... 129
Microphones.................................................................................................................. 129
Measurements......................................................................................................131
Types............................................................................................................................. 131
Calibration ............................................................................................................132
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Table of Contents
Part numbers........................................................................................................ 133
Port pinouts.......................................................................................................... 135
Customer service................................................................................................. 149
Contacting 3M ...................................................................................................... 149
Warranty ...............................................................................................................150
FIGURES
Octave bands.................................................................................................................. 2
Third Octave bands........................................................................................................ 3
Hardware Interface Panel............................................................................................... 6
The Unit Information screen.......................................................................................... 8
Identify SoundPro equipment...................................................................................... 11
SoundPro & Preamp..................................................................................................... 12
SoundPro with microphone and windscreen............................................................. 13
Installing batteries........................................................................................................ 14
Battery check screen ................................................................................................... 15
Selecting Setup in the Start Screen............................................................................ 16
Selecting battery type in battery check screen.......................................................... 16
Attaching the charger adapter with the plug adapter................................................ 17
Base (or bottom) of SoundPro .................................................................................... 17
Figure 2-10: SoundPro SE/DL start screen and keypad................................................................. 18
Microphone Settings (Signal Input screen)................................................................ 24
Time and Date Settings................................................................................................ 25
Measurement type and start screen ........................................................................... 26
Meter 1 and Meter 2 parameters.................................................................................. 27
Measures screen for community noise settings........................................................ 28
C-A measurement settings for Meter 1 and Meter 2.................................................. 30
Logged Data Chart example........................................................................................ 31
Logging screen explained ........................................................................................... 32
Display setup screen.................................................................................................... 33
Figure 3-10: Language screen.......................................................................................................... 34
Figure 3-11: Backlight setting........................................................................................................... 35
Auto-Run with Date selected....................................................................................... 38
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Table of Contents
Setting Date parameters for Auto-Run #1 .................................................................. 39
Example of setting up Auto-Run (QSP-II)................................................................... 40
Day of the Week (DOW) setup ..................................................................................... 41
Auto-Run Shutdown screen ........................................................................................ 42
Timed Run setup screen.............................................................................................. 43
Level-Triggered screen................................................................................................ 44
Secure/Lock option ...................................................................................................... 47
Secure/Lock screen...................................................................................................... 47
Figure 4-10: Adding code for secure/lock screen........................................................................... 48
Figure 4-11: Secure/lock run prompt ............................................................................................... 48
Figure 4-12: Secure/lock setup prompt............................................................................................ 49
Figure 4-13: Digital-Out screen......................................................................................................... 50
Figure 4-14: QSP/Serial..................................................................................................................... 52
Figure 4-15: Mass Storage................................................................................................................ 52
Figure 4-16: Log to Port .................................................................................................................... 53
Figure 4-17: Comm-Set screen for GPS data .................................................................................. 54
Figure 4-18: Viewing GPS coordinates in COMM-Set screen ........................................................ 55
Bar chart screen (A) and Filtered Bar Chart (B)......................................................... 60
Attaching calibrator to SoundPro ............................................................................... 62
Setting pre-cal screen.................................................................................................. 63
Calibration history screen ........................................................................................... 63
Post-Calibrate history screen...................................................................................... 64
Bar Chart screen in run mode ..................................................................................... 64
Selecting measurements with Lookup softkey.......................................................... 66
Example measurement icons & descriptors.............................................................. 67
Bar Chart screen and Filtered Bar Chart screen........................................................ 68
Figure 5-10: Community Noise screen............................................................................................. 69
Figure 5-11: Dosimetry screen ......................................................................................................... 70
Figure 5-12: Tabulation screen for octave filtering......................................................................... 71
Figure 5-13: Back-erasing................................................................................................................. 72
Figure 5-14: Time Log screen........................................................................................................... 74
Figure 5-15: Stopping and pausing.................................................................................................. 75
Reverb Time.................................................................................................................. 78
Interrupted noise example........................................................................................... 79
Reverb Time Setup screen........................................................................................... 81
Reverb Time Setup screen........................................................................................... 83
RT60 bar chart screen.................................................................................................. 84
Decay curve screen...................................................................................................... 85
Tabular octave filtering RT screen.............................................................................. 86
Selecting measurement type for curves..................................................................... 88
Captured Curves and Survey mode............................................................................ 89
Figure 6-10: Selecting 1/1 or 1/3 for measurement type................................................................. 90
Figure 6-11: Capturing a curve (CAP-1)........................................................................................... 91
Figure 6-12: Selecting measurement type for curves..................................................................... 92
Figure 6-13: Curves setup screen example..................................................................................... 93
Figure 6-14: 1/1 or 1/3 octave measurement type for audiometric testing ................................... 94
Figure 6-15: Selecting measurement type for curves..................................................................... 95
Figure 6-16: Audiometric booth setup in the curves screen.......................................................... 95
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Table of Contents
Figure 6-17: Curve results................................................................................................................. 97
Figure 6-18: Measurement type selection (STIPA)........................................................................ 101
Figure 6-19: STI-PA setup screen................................................................................................... 102
Figure 6-20: Level set-up and average decibel level .................................................................... 103
Figure 6-21: STI-PA measurement (scale results) screen............................................................ 104
Figure 6-23: STI-PA Modulation envelope screen......................................................................... 106
Figure 6-26: Captured curves/background noise ......................................................................... 108
Figure 6-27: Post CAP-1 applied during STI-PA test .................................................................... 108
File Screen .................................................................................................................. 112
Start menu screen ...................................................................................................... 113
File menu screen ........................................................................................................ 113
Data File screen.......................................................................................................... 114
Selecting past study data (review mode) ................................................................. 114
Viewing past data example........................................................................................ 115
Loading and deleting files ......................................................................................... 116
Examples of directory screens.................................................................................. 116
Naming a file in the Data File screen ........................................................................ 117
Figure 7-10: Saving/Creating setup file (config. file) .................................................................... 118
Figure 7-11: Viewing, loading, deleting setup files....................................................................... 119
Pinout for the AC/DC output jack.............................................................................. 135
Figure A-2L Auxiliary connector.................................................................................................... 135
TABLES
Table 1-1: Acoustical range bands ........................................................................................................... 4
Table 2-1: Keypad explained.................................................................................................................. 19
Table 2-2: Screen Indicators................................................................................................................... 20
Table 3-1: Required microphone settings............................................................................................... 23
Table 3-2: Measures screen explained................................................................................................... 29
Table 4-1: Level triggered auto-on settings explained............................................................................ 45
Table 5-1: Measurement notations......................................................................................................... 57
Table 5-2: Sessions and studies explained ............................................................................................ 59
Table 5-3: Measurement screens explained........................................................................................... 65
Table 5-4: Measurement icons and screen descriptors explained.......................................................... 67
Table 6-1: Reverb time set-up options.................................................................................................... 80
Table 6-2: Tabular RT60 field explanation.............................................................................................. 86
Table 6-3: Measures setup screen parameters explained ................................................................... 101
Table 8-1: AC output ............................................................................................................................ 123
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CHAPTER
1
Models and options
Octave bands
1
Introduction
The SoundPro SE and DL series of sound level meters (SLM) from 3M are advanced
instruments with highly adaptable characteristics. This manual explains the features
and functions of all models in the series and points out distinctions between the
models.
Models and options
There are twelve models in the SoundPro SE and DL series. The differences between
models are accounted for by three primary characteristics: accuracy of measurement,
frequency resolution, and the types of data stored. The table in Figure 1-1
summarizes the characteristics of all twelve models and includes add-on features for
Reverberation, Speech Intelligibility and Acoustic Spectral Curves.
Part #
Model
SP-SE-2
SoundPro SE SLM
X
X
X
X
X
X
X
X
X
X
X
X
X
X
SP-SE-2-1/1
SP-SE-2-1/3
SP-SE-1
SoundPro SE 1/1 Octave RTA
X
SoundPro SE 1/1 & 1/3 Octave RTA
SoundPro SE Sound Level Meter
X
X
X
SP-SE-1- 1/1
SP-SE-1-1/3
SP-DL-2
SoundPro SE 1/1 Octave RTA
X
X
SoundPro SE 1/1 & 1/3 Octave RTA
SoundPro DL Datalogging SLM
X
X
X
X
X
X
SP-DL-2 – 1/1
SP-DL-2 – 1/3
SP-DL-1
SoundPro DL 1/1 Octave Datalogging RTA
SoundPro DL 1/1 & 1/3 Octave Datalogging RTA
SoundPro DL Datalogging SLM
X
X
X
X
X
X
X
X
SP-DL-1 – 1/1
SP-DL-1 – 1/3
SoundPro DL 1/1 Datalogging RTA
SoundPro DL 1/1 & 1/3 Octave Datalogging RTA
X
X
Part #
Description
Compatible with the following models:
Speech Intelligibility (STI-PA) and
Acoustic Spectral Curves
SP-SE-2-1/1 SP-SE-2-1/3 SP-SE-1-1/1 SP-SE-1-1/3
SP-DL-2-1/1 SP-DL-2-1/3 SP-DL-1-1/1 SP-DL-1-1/3
Option-1
Speech Intelligibility (STI-PA) with
accessories and Acoustic Spectral
Curves
Reverberation measurement and RT60
analysis (part number: 053-768)
SP-SE-2-1/1 SP-SE-2-1/3 SP-SE-1-1/1 SP-SE-1-1/3
SP-DL-2-1/1 SP-DL-2-1/3 SP-DL-1-1/1 SP-DL-1-1/3
(SoundPro SE and DL models with 1/1 and/ or 1/3 only) includes:
●SP-SE-2-1/1 SP-SE-2-1/3 SP-SE-1-1/1 SP-SE-1-1/3
SP-DL-2-1/1 SP-DL-2-1/3 SP-DL-1-1/1 SP-DL-1-1/3
Option – 2
Reverberation
Figure 1-1: SoundPro Models SE and DL and Option 1 and Option 2
Models SE and DL
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Frequency resolution
Octave bands
Frequency resolution
The sounds we hear are rarely pure tones at a single frequency but rather a
mixture of frequencies of varying amplitudes. Some sounds, such as a whistle
or a horn, have frequencies concentrated in relatively narrow regions of the
audio spectrum, which ranges from approximately 20 Hz to 20,000 Hz. Other
sounds, more generally thought of as noise, include components from many
regions of the entire spectrum.
When analyzing sound as noise, we usually are concerned with the total
impact of the sound signal. In other words, we are usually satisfied with a
broadband measurement of sound in the environment. When we are seeking
to isolate a sound from other sounds, for instance to detect the source of a
sound or to measure how much particular sounds contribute to the overall
sound level, we may want to look at the frequency components of the sound.
Octave bands
The ability of an instrument to separate a signal into its frequency
components is known as a spectral analysis. In sound pressure
measurement, the audio spectrum is divided into adjacent frequency bands
called octaves, where the center frequency of each octave band is twice the
center frequency of the octave band directly below it. There are eleven octave
bands in the audio spectrum.
Figure 1-2 illustrates the relationship between the bandwidth of a typical
sound measuring instrument and the octave bands that span the audio spec-
trum. Note that the highest and lowest octaves at 16 Hz and 16 kHz lie
entirely within the bandwidth of the instrument.
Figure 1-2: Octave bands
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Frequency resolution
Third -octave bands
Third -octave bands
Each octave band can be divided into three adjacent bands called third-
octave band. Because of the logarithmic relationship between adjacent
bands, the center frequencies of third-octave bands differ from each other by
26%. For example, the center frequency of the next third-octave band above
the 1000 Hz third-octave band is at 1260 Hz. Figure 1-3 is similar to Figure 1-
2 but shows the thirty-three third-octave bands in relation to the instrument’s
bandwidth.
Figure 1-3: Third Octave bands
Naming bands
Bands are conventionally named for their center frequencies in accordance
with acoustical industry standards. Table 1-1 identifies the SoundPro SE or
DL models that have octave and third-octave bands option with their exact
center frequencies and their corresponding standardized names.
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Frequency resolution
Naming bands
Exact Center
Names of Octave
Bands (Hz)
Names of Third-octave
Bands (Hz)
Frequency (Hz)
12.589
15.849
19.953
25.119
31.623
39.811
50.119
63.096
79.433
100.00
125.89
158.49
199.53
251.19
316.23
398.11
501.19
630.96
794.33
1000.0
1258.9
1584.9
1995.3
2511.9
3162.3
3981.1
5011.9
6309.6
7943.3
10000
12.5
16
16
31.5
63
20
25
31.5
40
50
63
80
100
125
125
160
200
250
250
315
400
500
500
630
800
1000
2000
4000
8000
16000
1000
1250
1600
2000
2500
3150
4000
5000
6300
8000
10000
12500
16000
20000
12589
15849
19953
Table 1-1: Acoustical range bands
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Logging explained
Analysis type
Analysis type
All SoundPro SE/DL instruments are capable of analyzing sound signals over
the full bandwidth of the instrument also referred to as “broadband
measurement”. If your instrument comes equipped with a filter, it can perform
an octave or a third-octave analysis, or both, depending upon the type of filter
installed. You can vary the analysis type between sessions, and the analysis
type selection remains constant throughout the session.
Analysis types are identified in SoundPro SE/DL by the following names:
•
•
•
•
SLM - Broadband measurements
1/1 - Octave filtering
1/3 - Third-octave filtering
STI-PA -Speech Intelligibility
Logging explained
Although you can view the current sound pressure level at any time that the
instrument is operating (See “Bar Chart and Filtered Bar Chart” on page 67),
most measurements are reported for data obtained over the entire course of a
study or session. In some circumstances, however, you may want to save
intermediate measurement results. The SoundPro DL logging option provides
you with that capability.
With logging enabled, you can save selected measurements at fixed intervals
during a session. You can set logging to occur as often as once per second or
as seldom as once per hour. Once the logging characteristics are determined,
the setup remains the same for the duration of the session.
Logged data is automatically saved to the instrument’s memory card and can
be viewed in QSP II (“Information screen” on page 8).
NOTE: You must use a compatible SD card. For information about
replacing the SD card, see “Compatibility” on page 117.
Physical Characteristics
The Display
The transflective LCD display contains an area on the top of the screen for
indicators including run, pause, stop icons and a run time clock. The middle
of the screen contains a fine resolution of pixels in which data is displayed
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Physical Characteristics
Hardware interfaces
both numerically and graphically. This is explained in further detail in
Chapter 2, “The Display and keypad”).
Hardware interfaces
The Hardware Interface Panel, shown in Figure 1- 4, is located under a
hinged cover in the base of the instrument. The cover can be lifted by a tab
at one side, and snapped shut again by closing and pressing firmly at the
center.
Figure 1-4: Hardware Interface Panel
Memory card slot
A Secure Digital (SD) removable memory card is shipped with each
SoundPro SE/DL instrument. The card should always be in place when you
are operating the instrument. More information about operating with the
memory card is given under “Memory card” on page 106.
NOTE: You must use a compatible SD card. For information about
replacing the SD card, see “Compatibility” on page 117.
USB port
A USB cable is shipped with each SoundPro SE/DL instrument. One end fits
the mini B port in the instrument. The other end fits a standard USB
connector on a personal computer. A USB connection to a personal
computer allows files to be transferred, settings to be downloaded to the
instrument, and post- session analysis to be performed in the computer using
data files created in the instrument.
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Physical Characteristics
Hardware interfaces
AC/DC port
Connect a cable with a standard 3.5 mm stereo plug to this jack to obtain AC
and DC output signals. Users are responsible for providing their own cable.
Power jack
DC power can be delivered to the instrument through the Power jack. Power
will be taken from the external source rather than the instrument’s batteries
when the external source provides 8 to 16 volts DC (300ma minimum).
Two optional sources for this power are available: a switching power supply
connected to an AC source and DC power provided through the accessory
jack of most automobiles. For the technical specifications, see “Power
sources” in Appendix A. Part numbers are given under “Optional parts” in
Appendix A.
Auxiliary port
Use this port to connect the SoundPro SE/DL instrument to other devices.
The two types of functions, described below, are available through the
terminals of this port. A pinout of the port is provided under “Auxiliary
connector” on page 139.
•
Digital I/O - A group of contacts within the port provides one, logic- level
input and three, logic-level outputs. See “Digital Outputs/Triggering” on
page 50 are information about configuring and using the triggers.
•
RS-232 - A group of contacts within the port supports the RS-232
protocol for communication between the instrument and other devices,
such as a Global Positioning Satellite (GPS) receiver. See “GPS” on
page 54 for information about configuring the port for this purpose.
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Information screen
Screen contents
Information screen
Every SoundPro SE/DL instrument describes its unique characteristics in its
Information screen. In the Start screen, press
to select Unit Info, then
press
. The Unit Info screen appears (Figure 1-5).
\UNIT INFO
SoundPro DL-1-1/3
Serial #
Revision
Installed Features:
CURVES
1
2
BIF120010
B 12M
3
STI-PA
Figure 1-5: The Unit Information screen
Screen contents
The lines indicated in Figure 1-7 will contain the following information.
Line 1 - Model number showing, in order, the 3M designation (SE or DL), the
Class/Type (1 or 2) and the filter, if installed (1/1, 1/3 or blank).
Line 2 - Unique serial number assigned when the instrument was
manufactured.
Line 3 – The installed feature’s field lists any extra options (note: these may
be additionally purchased features as displayed above for Curves and STI-
PA.)
NOTE: It’s a good idea to record Information screen data in the event that
you need assistance and the instrument refuses to power up. For 3M
assistance, see “Contacting 3M” on page 149.
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9
Detection Management Software DMS
DMS Start Page
Detection Management Software DMS
3M™ Detection Management Software DMS is used to record, report, chart and analyze data
collected for assessment of select occupational health hazards in the workplace. Designed for
dosimetry, sound level measurements, heat stress assessments and environmental
monitoring, the software helps safety and occupational professionals:
• Retrieve, download, share and save instrument data
• Generate insightful charts and reports
• Export and share recorded data
• Perform “What If” analysis and recalculate data based on selected time intervals
• Set up instruments and check for firmware updates
Some data can only be displayed in DMS. One example is logging data obtained when
logging is enabled in an instrument equipped with that option (“Logging” on page 33). Another
example is with the GPS function. When enabled the data is viewable in DMS.
DMS Start Page
Navigational
buttons
(1)Setup
(2)Download
(3)Data Finder (look
at your session
data or use Quick
Report feature)
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Detection Management Software DMS
DMS Start Page
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CHAPTER
11
Checking the equipment
DMS Start Page
2
Getting Started
This chapter provides the basic information you need to “get up and go”
essentially right out of the box, including getting your first glimpses of SPL.
Checking the equipment
If your instrument was sent to you in a storage case, you will want to remove
all the packaging and acquaint yourself with the equipment, so you can
quickly get started. The items below are included in a “standard” SoundPro
SE or DL kit.
Preamp
SoundPro
Microphone
•
Optional 1”, ½”, and ¼”
microphones available
USB cable
Windscreen
QSP- II software
4-AA alkaline batteries
•
Optional feature
Figure 2-1: Identify SoundPro equipment
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12
Microphone and accessories
Installing the preamp
Installing the preamp
The preamplifier is detachable for storage purposes or if you wish to connect
an extension cable for distance monitoring.
Connecting to the instrument
Place the preamp connector
over the mating connector at the
top of the instrument. Gently
Twist preamp
press down while rotating the
preamp until the preamp
connector drops slightly in
place.
locking ring onto
SoundPro
Figure 2-2: SoundPro & Preamp
1. While pressing the connector together to engage the threads, rotate
the black knob clockwise to secure the preamp to the instrument. It
will fit snuggly.
Connecting an extension cable
Extension cables are available from 3M as options and are typically used
to distance the instrument body from the microphone to reduce distorting
reflections from the instrument’s case.
1. Attach the cable to the base as if it were the preamp and then follow
the steps above “Connecting to the instrument”. Attach the preamp to
the other end of the cable.
Microphone and accessories
The instrument is ordered either for Class/Type 1 or Class/Type 2 use. See
“Distinctions between models” on page 1 for information about this classifi-
cation. The microphones are treated differently for the two classes of instru-
ments.
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13
Microphone and accessories
Class/Type 1 and Class/Type 2 instrument
Class/Type 1 and Class/Type 2 instrument
The SoundPro is shipped with the Type 1 in a protective case with a serial number
labeled on the side of the microphone. Similarly, the SoundPro with the Class/Type 2
microphone is also shipped in a protective case. To attach and remove the
microphone, please follow one of the types below:
•
BK4936 microphone - Remove the microphone from its case and thread it on the
SoundPro SE/DL preamp in accordance with the instructions provided in the
microphone case. Note that the BK4936 microphone is provided with a Random
Incidence Corrector (RIC). Use the same microphone instructions for information
about using and installing that device.
•
•
All other Class/Type 1 microphones - Remove the microphone from its
protective case and thread it on the preamp. Before using, be sure to remove the
plastic cap and save it in the case for future use.
Class/Type 2 microphones – Remove the
No
microphone from its protective case and thread it on
the preamp. Before using, be sure to remove plastic
cap and save it in the case for future use.
Yes
NOTE: to properly remove the microphone, please
adhere to the caution sticker located on the backside of
the instrument and the drawing to the right.
Windscreen
Use a windscreen that fits the tip of the microphone to reduce sound disturbances
caused by physical contact and wind turbulence. 3M provides the WS-7
windscreen that fits a ½-inch microphone with every instrument kit. If you didn’t
order a ½-inch microphone, or if you have one of different size, you may wish to
order a windscreen for the other size.
Figure 2-3: SoundPro with microphone and windscreen
Models SE and DL
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Providing power
Installing Batteries
Providing power
You can power the instrument with internal batteries or from an external power
source. There are two optional sources which include a universal power supply
9V/.66A 2.1 mm and an auto DC jack cable 12V. (See Optional Parts, in Appendix
A for more details.)
Installing Batteries
The instrument requires four AA-sized batteries. Disposable alkaline batteries
are satisfactory, but you may also use rechargeable Nickel Metal Hydride
(NiMH) batteries.
•
Rechargeable batteries ~ The instrument does not contain a recharging
circuit. Recharge batteries externally using the recharging device
available from 3M or a compatible device available elsewhere.
•
Selecting batteries ~ Do not mix battery types or batteries with
significantly different charge levels.
NOTE: To avoid possible battery leakage, remove the batteries when the
meter is not in use for prolonged periods.
To install batteries
1. With the back of the instrument facing up, push the release latch to pop
open the battery lid (Figure 2-1).
Figure 2-4: Installing batteries
2. Lift off the lid and set aside. Wedge out the four batteries.
3. Replace the batteries with fresh batteries, taking care that you orient all
batteries with the positive ends toward the base, as shown in the drawing.
4. Re-insert the lid by fitting its locator pins into slots in the base end of the
battery compartment. The lid should fit snugly when correctly inserted.
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Providing power
Battery power explained
5. Press the top edge of the lid to snap it into the latch.
6. Verify or set the type in the Battery Check screen. (See the next section
“Checking battery power”.)
Battery power explained
The battery check screen is used to determine the battery/power status of the
instrument. When operating on batteries, the grey area in each cell graphic
indicates the charge on each cell (Figure 2-5).
When operating on an external power source (see next section, “external
power sources”), the external power will take precedence over batteries if
installed.
Battery indicator
If all bars appear up
to starting line, this
indicates full battery
power
Externally powered
If using an external
power source, EXT
will appear and all
batteries will be fully
shaded indicating full
power capacity.
Figure 2-5: Battery check screen
Checking or changing type
The battery type selection in this display affects the accuracy of the
Battery Indicator that appears in many SoundPro SE/DL displays.
NOTE: It is recommended to match the battery type to the type
of batteries installed in the instrument, or you may experience
an unexpected shutdown.
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16 Providing power
Checking or changing type
Battery Check screen
1. Turn on the SoundPro SE/DL by pressing On/Off/ESC
. You will be at
the start screen.
•
If turned on, ensure you are at the start screen by pressing On/Off/Esc
repeatedly until the start screen appears.
Setup
Figure 2-6: Selecting Setup in the Start Screen
2. Press Up/Down arrows to highlight Setup and then press Enter
.
3. In the Setup screen, select Battery, then press Enter
. The Battery
Check screen appears.
B : Press softkey
to select NiMH
A: Press softkey
to select Alkaline
Softkey buttons
Figure 2-7: Selecting battery type in battery check screen
4. Press the softkey that corresponds with the installed battery type (See “A” or
“B” in Figure 2-7 for selection). The label above the softkey is underlined to
indicate the current selection.
5. When completed, press On/Off/Esc
once to return to the Setup screen
and twice to return to the start screen.
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Providing power
Using power supply or auto adapter
Using power supply or auto adapter
If you obtained the optional Universal power supply
9V cable or the Auto DC Jack 12 VDC adapter from
3M, plug them into their respective power sources
and the other end into the Power jack of the
instrument. If the external power source provides
the correct voltage (8-16 VDC) and sufficient
current (300 mA minimum), it will be used in
place of the batteries if they’re installed in the
instrument.
Auto
adapter
Universal
power
supply
Figure 2-8 illustrates the assembly of the Universal power supply and the plug
adapter. It slides into place by guiding it down the back cavity (opening) of the
power supply.
- NOTE: the example is a typical adapter which may be different than the one
you are using. Mechanically, it will function similarly.
A. Universal power supply 9V
B. Slide plug adapter into the crevices of base
Figure 2-8: Attaching the charger adapter with the plug adapter
Connecting power supply source
1. Ensure the power supply is assembled (for universal power supply only).
2. Plug the power cord into the power jack by opening the base cover. Attach the
opposite end into the power supply (i.e., outlet/automobile jack) (as discussed
in “Hardware interfaces”, page 6.)
Power Jack
Figure 2-9: Base (or bottom) of SoundPro
3. Plug the opposite end into the power supply.
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Turning on
Start screen and the keypad
Turning on
1. To turn on the SoundPro, press the On/Off/Esc
key until the start
screen appears.
Start screen and the keypad
The Start screen is the first screen you see when you power on and the last
screen you see when you shut down. This essential main screen is also used
to navigate through the menu options.
The keypad and softkeys are used to setup the instrument, run a study, stop
a study, view your measurement values, and power on and off the meter.
Indicators
•
•
•
Battery power:
Stop:
Run time: 00:00:00
1. Display
7. “Softkey” Menu:
<SLM> CAL
FILE COMM
Correspond with softkeys
8. Softkeys
2. Backlight
3. Stop
9. AltF
10. Enter
4. Left
11. Right arrow
5. Up/Down arrows
12. ON/Off and ESC
6. Run/Pause
Figure 2-10: SoundPro SE/DL start screen and keypad
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19 SoundPro functionality
The keypad explained
SoundPro functionality
The keypad explained
The SoundPro SE/DL keypad consists of three general types of keys: soft-
keys, navigation keys and dedicated keys.
Keypad
Explanation
1. Display
Used to view data, menus, and various
indicators.
2. Backlight
3. Stop
Used to illuminate the background of the
display/screen. (i.e., nighttime study.)
Used to stop your study when in the Run or
Pause modes. A 3,2,1 countdown will appear as
you continue to press the stop button.
4. Left arrow
Used to navigate left through menus and/or data.
Used to navigate through menus and/or data.
5. Up/Down Arrows
6. Run/Pause
Used to Run or Pause a study. (A run or pause
indicator will appear at the top of the screen to
signal you of the appropriate mode.)
7. Softkey menu
The softkey menu are additional menu options for
setting measurement type (i.e, SLM, 1/1, etc.),
Calibrating, Loading a study file, setting
Lock/secure settings, and many more options.
8. Softkeys
9. Altf
The Softkey buttons correspond with the softkey
menu. (Please see Figure 2-10 above).
The Altf button (or Alternate functions) is used to
expand the softkey menu at times.
10. Enter
Used frequently to execute an action. Typically
used after you have first pressed one or more
arrow keys to make a selection.
11. Right arrow
Used to navigate right through menus and/or
data.
12. On/Off and ESC
Used to turn on the SoundPro, turn off, and to
Escape (or move back one screen).
Table 2-1: Keypad Explained
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SoundPro functionality
Indicators explained
Indicators explained
Status information is provided by the instrument at the top of the display.
Below is a summary of all of the indicators.
Icon
Significance
Battery charge status. This icon shows the status/level of the
batteries. A full battery indicates one of the following:
•
•
externally powered
or the SoundPro is fully charged.
Run state. This icon appears when a study is running.
Paused state. This icon appears when the current session is
open but paused.
Stop state. This icon appears when the current session is
stopped.
Review mode. When the pause and stop icons appear, this
indicates that you are viewing a saved file.
Overload condition. When an overload occurs during a study,
this indicator appears and remains lit until the beginning of the
next study.
OL
UR
Underrange condition. When an underrange condition occurs
during a study, this indicator appears and remains lit until the
beginning of the next study.
Alternate functions. This icon appears below the Battery
Charge Indicator when alternate functions are being displayed.
Table 2-2: Screen Indicators
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Turning off
Navigating
Navigating
To navigate to menus and data screens, the up/down
arrows and left/right arrows
are primarily used.
The On/Off Esc
button is also used as a navigational
tool at any time you wish to move back one level. If you
press ESC repeatedly, you will return to the start screen.
Turning off
1. To turn off the SoundPro, ensure the meter is stopped (i.e., indicator
will display on the top of the screen).
2. Press and hold the On/Off/ESC
button until the start screen
disappears.
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Navigating
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CHAPTER
23 Basic setups
Navigating
3
Basic setups
This chapter covers the basic features and setups of SoundPro SE/DL that
establish the instrument’s operating conditions. For information about the
more advanced SoundPro SE/DL features and their setups, see Chapter 4,
“Advanced setups.” For information on setting-up and measuring add-on
features (Reverberation, STI-PA, or Curves), please see Chapter 6.
•
•
•
•
•
•
•
Microphone Settings
Setting Date-Time
Setting Measurement type (SLM, 1/1, 1/3, STI-PA)
Setting up Meter 1/Meter 2 parameters
Setting up Exceedance levels
Setting up Logging
Setting physical settings: backlight “on” time, contrast, choosing a
language
•
Microphone settings
With Class/Type 1 models, the microphone’s sensitivity, range cap, and
polarization can be checked and/or changed in the “Signal Input” menu
(when stopped). Alternatively, Class/Type 2 models settings are viewable at
any time the session is stopped but cannot be modified.
The following table displays the required microphone settings.
Signal Input
Sensitivity a
BK4936 QE7052 QE4110 QE4130 QE4150 QE4170
-28.0
140
0
-29.0
140
0
-49.1
160
-36.0
140
-26.0
140
-28.0
140
Range Cap (dB)
Polarization (V)
200
200
200
200
Table 3-1: Required microphone settings
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24 Basic setups
Changing microphone settings
Changing microphone settings
Microphone settings
This procedure applies only to Class/Type 1 models.
1. Turn on the SoundPro SE/DL by pressing On/Off/Esc
.
•
If turned on, ensure you are at the start screen by pressing
On/Off/Esc
repeatedly until you return to start screen (see Figure
2-10).
2. Press Up/Down
Enter
arrows to highlight Setup and then press
.
3. In the Setup screen, select Sig. Input, then press Enter
. The Signal
Input screen appears.
Menu path displayed
A. Sensitivity
B. Range Cap
C. Polarization
Figure 3-1: Microphone Settings (Signal Input screen)
4. Signal Input options are explained below (refer to Figure 3-1 above).
A. Sensitivity ~ Calibration parameter for the selected microphone. This is
a nominal value in decibels relevant to 1V/Pa.
B. Range Cap ~ Top of the measurement range for the microphone/
instrument combination. In any screen showing a decibel range, this
setting affects the maximum value.
C. Polarization ~ A value of the polarization voltage for the microphone.
Some microphones have an internal polarization, while others require a
polarization provided by the instrument.
5. To change a signal input field, press Up/Down
arrows to highlight
specific field (s).
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25
Basic setups
Time and date
6. Press Enter
. The result will be one of the following:
•
For Sensitivity and Range Cap fields - The highlighting moves to the
data field. Press Up/Down
arrows to change the value.
•
Polarization field - Polarization remains highlighted. Continue to press
Enter to change (or toggle) the value from 0 V to 200 V.
7. Once desired fields are changed, press On/Off/ Esc
twice to return to
the Start screen.
Time and date
SoundPro SE/DL uses a 24-hour clock and specifies date by month and year.
Changing time and date settings
1. Turn on the SoundPro SE/DL by pressing On/Off/Esc
.
•
If turned on, ensure you are at the start screen by pressing On/Off/esc
repeatedly until you return to start screen (see Figure 2-10).
2. Press Up/Down to highlight Setup and then press Enter
3. In the Setup screen, select Time-Date, then press Enter
.
.
4. In the Time-Date screen, press
to select either the Time, Date, Day
fields. Then do one of the following:
a. For Time field, press Enter
repeatedly to highlight either the hour,
minutes, or seconds. Next, press Up/Down
to change the value.
b. For Date field, press Enter
repeatedly to highlight either day, month,
to change the value.
or year. Next, press Up/Down
c. For Day field, press Enter
repeatedly to highlight either day, month,
to change the value.
or year. Next, press Up/Down
a. Time
b. Date
c. Day
Figure 3-2: Time and Date Settings
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Basic setups
Measurement type (SLM, 1/1, 1/3, STI-PA, RT60)
NOTE: To move to between the time, day, day fields, press Enter repeatedly
until one of these fields are highlighted and then press Up/Down arrow to move
between the fields.
5. If you’re finished working in the Time-Date screen, press On/Off/Esc
once to return to the Setup screen and twice to return to the Start screen.
Measurement type (SLM, 1/1, 1/3, STI-PA, RT60)
The measurement type is easily selectable at the start screen via a softkey
button. This is assessable at all times unless you are running a study. To
change or set the measurement type, ensure the SoundPro is stopped as
indicated by the stop
icon. Depending on the options you ordered with
your SoundPro it may or may not have all the measurement types indicated
above. NOTE: For STI-PA and RT60, please see Chapter 6, “Additional
Options”.
Setting Measurement type
1. Turn on the SoundPro SE/DL by pressing On/Off/Esc
.
•
If turned on and you are not at the start screen, press On/Off/Esc
repeatedly until the start screen appears (see Figure 3-3).
2. At the start screen, select the first softkey button repeatedly until the
appropriate measurement type is selected.
•
You may have the following selectable options: Sound level meter (SLM), 1/1
octave, 1/3 octave, and/or STI-PA (Speech Transmission Index).
Softkey menu
Measurement type
(Sound Level Meter)
1st softkey
Repeatedly press to
move (toggle) through
measurement types
Figure 3-3: Measurement type and start screen
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27 Basic setups
Meter 1/Meter 2 Parameters (i.e. response time, weighting)
Meter 1/Meter 2 Parameters (i.e. response time,
weighting)
Setting up Meter 1 and Meter 2 parameter settings are changed through the
softkeys and the Measure Set screen of the SoundPro.
Setting up Meter 1 and/or Meter 2 parameters
1. Ensure you are at the start screen.
•
If turned on, press On/Off/Esc
repeatedly until you return to the
start screen (see Figure 3-3).
2. Press Up/Down
to highlight Setup and then press Enter
.
3. Select Meter Set by pressing Up/Down
Enter
to highlight and then press
.
4. To set the response time for Meter 1, press the second softkey repeatedly
until the either Fast (F), Slow (S), or Impulse (I) is selected.
•
An underline denotes which feature is selected.
5. To set the weighting for Meter 1, press the third softkey repeatedly until
either A, C, Z, of F is underlined (or selected).
•
To set Meter 2 response time and weighting, press 4th softkey until
Meter 2 is selected. Then repeat steps 4 & 5.
6. To change the Meter parameters, press Up/Down
to select one of
the Meter Set fields.
7. To change any of the values, press Enter
• Continue to press Enter until the specified setting is selected. Press
the Left arrow to return to the Meter Set fields.
to move to the data fields.
Parameters
Press Enter
repeatedly to
toggle through the
selections
Meter Set fields
Press up/down
arrows to move
between the
parameters
2ND softkey– Response time
3RD softkey– Weighting
4th softkey– Meter 1/Meter 2
Figure 3-4: Meter 1 and Meter 2 parameters
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28 Basic setups
Measurement setup (for community noise)
NOTE: For quick and easy access, there are three optional screens to change
the timed response and the weighting. These are in the following SoundPro
screens: Measures Set screen, View Current Study screen, and View Session
study screen.
Measurement setup (for community noise)
The measure screen is used to select community noise settings for meter 1
only. Table 3-2 below explains the settings and options.
Setting up community noise measurements (refer to figure 3-5 below)
1. Ensure you are at the start screen.
•
If turned on, repeatedly press On/Off/Esc
until you return to the
start screen (see Figure 3-3).
2. Press Up/Down
to highlight Setup and then press Enter
.
3. Select Measures from the Setup screen by pressing Up/Down
to
highlight and then press Enter
.
4. In the Measures screen, press Up/Down
to select one of the
measurements. To select second column, first press Up/Down arrows then
press Right arrow.
Measurements
2
1
Data fields
•
•
•
L1-L4
LDN, CNEL
Lc-a, TAKTMX
• Edit column 1 or column 2
fields by pressing enter
repeatedly to toggle through
selections.
Figure 3-5: Measures screen for community noise settings
5. To make changes to the data fields, do one of the following:
•
L1-L4 - Press Enter
repeatedly press Enter
to move to the data field. In the data field,
to change your selection.
•
•
Press
arrows to change percentage.
LDN - Press Enter
to move to data field and continue to press
Enter
to toggle between On/Off setting.
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29 Basic setups
Measurement setup (for community noise)
•
CNEL – Press Enter
to select data field. Press Enter
repeatedly to toggle between On/Off setting.
•
•
L
– Press Enter to select data field. If marked “N/A,” see “C-
c-a
A measurement settings.”
TAKTMX ~ Press Enter
one or more times to select 3 sec., 5
sec., or Off.
6. To change other measurement settings, repeat steps 4-5.
7. When finished, press On/Off/Esc to exit the screen.
The following table explains your selections in the Measures screen
(Please see Appendix B, Glossary of Terms for more details.)
Measurements Explanation
L1-L4
(Exceedance)
L1-L4 are types of exceedance levels. This is defined as the
level exceeded by the measured noise level for an identified
fraction of time. Exceedance levels may be calculated for
many time fractions (or percentages).
•
Optional Settings: Set to “Off” or to a percentage value of
your choice (1-99%).
LDN
Representing the Day/Night sound level, this measurement is
24-hour average sound level where 10 dB is added to all of the
readings that occur between 10pm to 7am. (Please see
glossary of terms for more details).
•
Optional Settings: Set to “Off” or “On”.
CNEL
Lc-a
Community Noise Exposure Level. The accumulated exposure
to sound measured in 24-hour sampling interval and artificially
boosted during certain hours.
Optional Settings: Set to “Off” or “On”.
This measurement (also commonly called C-A measurement) is
only available under certain conditions. Information about
viewing and changing these meter settings is discussed under
the next section, “C-A measurement settings”. Optional
Settings: Set to “On” and “Off”. See C-A section below for
parameter settings.
TAKTMX
A time average over a sampling that uses the highest level
occurring during the preceding Taktmaximal interval (either
three or five seconds), and assumes it was present for the
whole Taktmx interval.
Optional Settings: Set to “Off”, “3sec”, or “5sec”
Table 3-2: Measures screen explained
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30 Basic setups
Measurement setup (for community noise)
C-A measurement settings
The C-A measurement is determined from concurrent measurements of the
SPL by both meters. It can only be made if certain settings for Meter 1 and
Meter 2 are compatible. If any incompatibility exists, the Lc-a selection in this
screen will be marked N/A (Not Available).
If you want to activate Lc-a, have the following settings in place before you
visit the Measures screen.
•
Thresholds - Both meters set to “Off” or the same value.
•
•
•
Exchange rates- Both meters set to the same value.
Time response - Both meters set to the same value.
Frequency weightings- Meter 1 must be set to A-weighting; Meter 2
must be set to C-weighting.
Figure 3-6 is an example of the appropriate C-A settings for Meter 1 (left
side) and Meter 2 (right side). (Please see “Meter 1/Meter 2 Parameters” on
page 27 for setup details.)
A-weighting
Slow response
Meter 1
Slow response C-weighting Meter 2
• Press softkey to
toggle between
Meter 1/Meter 2
Figure 3-6: C-A measurement settings for Meter 1 and Meter 2
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Logging
Logging options
Logging
Logging options
If the logging option was
purchased, you will have the
following four types of
measurement options:
Figure 3-7: Logged Data Chart example
•
Average (AVG on the display), Peak, Maximum (MAX on the display),
Minimum (MIN on the display).
NOTE: When logging is enabled and you are viewing these
measurements on the SoundPro display, these are labeled as: L_avg (or
L_eq if the exchange rate is set to 3 dB), L_Pk, L_Mx and L_Mn,
respectively (See Chapter 5, “Preparing to measure and running”.)
Exceedance level
Up to two different exceedance level percentages, ranging from 1-99, can be
set in the Meter 1 Logging screen when the logging interval is set to 1
minute.
NOTE: if the logging interval field is not set to 1 minute, “N/A” (not
available) will appear in the data field.
Filters
The filter option is either a “On” or “Off” setting in Meter 1 and is only
available if the instrument contains a filter option. NOTE: The filter option
must be set to “on” to data log filtered data.
Logging interval
The logging interval is the length of time between logging events.
NOTE: The inverse of the logging interval is the logging rate.
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Logging
Setting logging options
Setting logging options
To set logging only options (Average, Peak, Maximum, Minimum)
Enabling or disabling logging options
1. Ensure you are at the start screen.
•
If turned on, repeatedly press On/Off/Esc
start screen (see Figure 3-3 above).
until you return to the
until the start screen
•
To turn on, press and hold On/Off/Esc
appears.
2. Press Up/Down
to highlight Setup and then press Enter
.
3. Select Logging by pressing Up/Down
to highlight and then press
Enter
.
4. To change the Logging options for Meter 1 do the following:
a. Press Up/Down
to highlight either AVG, PEAK, MAX, MIN.
b. Once the measurement is selected, press Enter
button to
toggle between “On” or “Off”. Press right/left arrow to move back
to logging field.
NOTE: If you are setting Meter 2 options, ensure you are on Meter 2 by
pressing the Meter 1/Meter 2 softkey, and then repeat step 4a-b.
Exceedance options
Set % by using the up/down
arrows.
Logging options
On/Off setting
•
•
L1
L5
•
•
•
•
AVG (average)
Peak
MAX (maximum)
MIN (minimum)
Filters
•
On/Off setting
Logging Interval
Logging rate which can
be set at various
minutes and second
values
•
Softkey: Meter 1/Meter 2
Figure 3-8: Logging screen explained
5. To change the Exceedance Levels on Meter 1, press Up/Down
select either L1 or L2
to
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Setting up display options
Setting logging options
6. Press Enter
to move to the data field. If it is Off and you want to set a
repeatedly until a percentage appears. To
disable, repeatedly press Enter until “Off” appears.
percentage, press Enter
a. To change the percentage, repeatedly press Up/Down
to
select a specific percentage.
b. Press right/left arrow to move back to Exceedance level field.
7. To change the Filters option, press Up/Down
to highlight
“Filters” and then press Enter to toggle between “On” or “Off”.
8. To change the Logging Interval, press Up/Down
“Interval”.
to select
a. Press Enter
change the value, repeatedly press Up/Down
appropriate minutes or seconds are displayed.
to move to the data field (i.e., 1 minute). To
until the
b. Press right/left arrow to move back to interval field.
9. To return to the Start screen, repeatedly press On/Off/Esc
button.
Setting up display options
The display’s backlighting, contrast and language characteristics can be
customized to suit your needs and preferences. These settings are available
in the Display screen (Figure 3-9).
Figure 3-9: Display setup screen
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Setting up display options
Language
Language
You can choose a different language for the displayed text. A change in lan-
guage takes effect when you exit the Language screen.
Changing the language
1. Ensure you are at the start screen.
• If turned on, repeatedly press On/Off/ESC
until you return to the
until the start screen
start screen (see Figure 3-3 above).
• To turn on, press and hold On/Off/ESC
appears.
2. Press Up/Down
to highlight Setup and then press Enter
.
3. Select Display by pressing Up/Down
to highlight and then press
Enter
.
4. In the Display screen, ensure Language is highlighted (or press up/down
arrow to select) and press Enter
.
• The Language screen appears. An asterisk (*) precedes the name of
the currently selected language.
5. Press Up/Down
selected) and then press Enter
6. Press On/Off/ESC twice to return to the start screen. The new
language will be displayed.
to select a language (an asterisk will appear if
.
\setup\display\LANGUAGE
*ENGLISH
ITALIANO
DEUTSCH
FRANçAIS
ESPAÑOL
PORTUGUESE
Figure 3-10: Language screen
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Setting up display options
Backlight
Backlight
Typically, the SoundPro is shipped with the
backlight setting enabled. With a quick press of
the backlight button from the keypad, you can
quickly turn on and turn off the backlight.
Backlight
The backlight feature has an optional timed
setting for various second intervals ranging from
1 second to 60 seconds. Once a timed setting is
activated and you press the backlight button, the
backlight will illuminate for the selected interval (i.e., 10 seconds) and then turn
off.
NOTE: Backlighting consumes energy at an increased rate. Leaving it on
while operating with batteries will decrease battery life by up to 10%.
Setting or viewing Backlight options
1. From the start screen, press Up/Down
press Enter
to highlight Setup and
to highlight Display and
.
2. In the Setup screen, press Up/Down
press Enter
.
3. In the Display screen, press Up/Down
to highlight Backlight.
4. Press Enter
to move to the data field. Repeatedly press Enter
to
toggle between “Manual” and “XX Sec” fields.
NOTE: if you are not setting the timed backlight, skip step four.
5. To change the timed backlight, ensure you are on a timed value (i.e., 10
seconds) and repeatedly press Up/Down
time. Once set, press the Left arrow.
to increase or decrease the
Backlight settings
•
Manual – The backlight is turned on
and turned off by pressing the
backlight button on the keypad.
Interval time – repeatedly press
Up/Down arrow to increase or
decrease the seconds.
LANGUAGE
BACKLIGHT
•
CONTRAST
Figure 3-11: Backlight setting
6. Press On/Off/ESC
twice to return to the start screen.
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Setting up display options
Contrast
7. To set the backlight, press the backlight button on the keypad.
Contrast
The contrast adjustment affects all pixels in the LCD screen. Choose a level
that looks best to you.
NOTE: If the contrast level is set too high, icons and the RunTime clock in
the Status Region of the display can be ghosted (visible in this display
although they’re not supposed to show). Reduce setting to avoid ghosting.
Changing the contrast on the display
1. From the start screen, press Up/Down
press Enter
to highlight Setup and
to highlight Display and
.
2. In the Setup screen, press Up/Down
press Enter
.
3. Press Up/Down
to highlight Contrast and then press Enter
.
4. Repeatedly press the left or right arrow to decrease or increase the
contrast.
NOTE: The contrast will change as you change the contrast color with
the left or right arrows.
5. To exit the display screen, press the On/Off/Esc
twice to return to the
Start screen.
LANGUAGE
BACKLIGHT
Contrast setting
Press Left arrow or Right
arrow repeatedly to
decrease or increase the
contrast.
CONTRAST
Figure 3-12: Contrast setting
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37
4
Advanced setups
This chapter covers the SoundPro models SE and DL features listed below,
all of which provide capabilities beyond the essential ones required for basic
model setup and basic sound measurement. For information about basic
SoundPro models SE and DL features and setups, see Chapter 3, “Basic
setups.” For information about the notation and navigation conventions that
are used in these explanations, see Chapter 1, “Introduction.”
•
Auto-Run - Similar to an “Auto-Start” feature, it will automatically start
and stop sessions based on time, date, duration settings and level-
triggered run mode (which is used to control runtimes of studies and
sessions using internal and external signals.)
•
•
•
•
Triggering - Control the runtimes of studies and sessions using internal
and external signals.
Security - Prevent certain uses of the instrument by someone who
doesn’t know the security codes (available for all instruments).
Logging - Periodically save selected measurements at a preset interval
during all studies of a session (only for DL models).
GPS - Obtain position and time information from the global positioning
satellite system, and store that information with each study that you
perform (only available if you have a compatible GPS receiver).
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Auto-Run
Date setting
Auto-Run
SoundPro SE/DL has four automatic run modes which include: Date auto-
start with duration, Day of the Week auto-start with duration, Timed Run
(duration only setting), and Level Triggered Runs (or Level auto-start runs).
Setting up auto-run
All Auto-Run setups begin in the Auto-Run screen. The Auto-Run screen
shows the current status of the Auto-Run feature. The following features are
available: Disabled, Timed Run, DOW (day of week), Date, and Level-
Triggered settings.
Date setting
A Date mode run wakes up the instrument from a powered down condition,
runs the study, saves it, then powers down again and is only executable
once. The parameters are selectable by specified dates and times with up to
four programmable individual setups.
A plus sign preceding a number (i.e., +1) indicates if one of the four settings
is enabled (or activated) where as a negative sign (i.e. -4) represents a
disabled (or deactivated) setting.
Setting up or changing auto-run with date parameter
1. From the start screen, press Up/Down
Enter
to highlight Setup and press
.
2. Select Auto-Run by using Up/Down
to highlight and press Enter
to select.
3. In the Auto-Run screen, repeatedly press Enter
until Date appears.
Date setting
View/Set Parameters – when
selected a new menu appears
Figure 4-1: Auto-Run with Date selected
4. To select View/Set Parameters, press the Down arrow to highlight and
press Enter
.
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Setting up auto-run
Date setting
5. Press one of the four softkeys in the Auto-Run Date screen to assign a
numbered setting (i.e., “Auto-Run #1).
NOTE: if setting up for the first time, the Date screen will appear as
“Auto-Run” “Off”. To turn on Auto-Run # 1, #2, #3, or #4, select the
appropriate softkey. (For example, Figure 4-3 displays setting up
softkey #1 parameters. When activated a “+” symbol appears.)
6. To set Date values, press Enter
to move to the first field.
. To move
•
To change the fields, press repeatedly Up/Down
between the day, month, and year fields, press the right/left arrows.
Auto-Run #1
Indicates which 1-4
softkeys is being viewed
or set
Day, Month, Year fields
Time settings
Add Start time (S) (8:15:00am)
Add Duration (D)
(16 hr, 30min, 0 sec.) (or 6:30:00pm)
Example: Press first
softkey to activate “Auto-
run #1” settings
Figure 4-2: Setting Date parameters for Auto-Run #1
7. To enter Start (S) Time and Duration (D) Time, it is important to note that
the settings are formatted as Hours:Minutes:Seconds and based on a
24-hour clock. In Figure 4-3, the Start time is indicated as “16:30:00”
which is equivalent to 4:30pm.
•
To Set, press Up/Down arrows to increase/decrease values. To
move between each increment, press Enter
8. To set additional Auto-Runs, repeatedly press Enter until “Auto-Run” is
.
highlighted. Then press Enter
to toggle on the Date and Time
settings. Then follow steps 5-7.
9. To exit the screen, press On/Off/Esc
repeatedly until you return to
the main screen. Press and hold the On/Off/Esc
to power off.
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Setting up auto-run
Days of week setting
NOTE: To enable Auto-run, ensure the instrument is powered off and
the date and time settings were programmed for the future.
10. When powered off, an Auto-Run shutdown screen will appear. (Please
see section, “Auto-Run shutdown screen”.)
Days of week setting
The Days of the Week (DOW) setting is a pre-programmed weekly auto-run with
specified days, start time, duration. You can pre-program two auto-on settings
with Sunday through Saturday parameters, one specific start time, and a
specified duration for each auto-on setting. (See Figure 4-4 as an example for
settings.)
NOTE: In order for the Days of the Week mode to autorun, ensure the
instrument is in the “off” position. The meter will then automatically switch into
Auto-Run based on your setup.
Days of Week (Auto-Run) setting
To program Auto-On 1, first select
the days of the week, then specify a
start time for your test with a
duration (to end your test).
Figure 4-3: Example of setting up Auto-Run (QSP-II)
A study run under the DOW mode wakes up the instrument from a powered
down condition, runs the study, saves it, then powers the instrument down
again. The cycle repeats for the next time and day in the setup, and for the
other Auto-on 2 if that is also activated in the mode.
Setting the Date of Week (DOW)
1. From the start screen, press Up/Down
press Enter
to highlight Setup and
.
2. Select Auto-Run by using Up/Down
to highlight and press Enter
to select.
3. In the Auto-Run screen, repeatedly press Enter
4. Press the Down arrow to select View/Set Parameters and press
Enter
until DOW appears.
.
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Setting up auto-run
Days of week setting
5. To set the Days, press Enter
program a day, press Up/Down
to move between the fields. To
to select a day setting. The first
character of the day will appear when selected.
•
The Days field is organized in the following sequence: Sunday (S),
Monday (M), Tuesday (T), Wednesday (W), Thursday (T), Friday (F),
Saturday (S).
•
For example, Figure 4-5 displays Sunday (S), Tuesday (T), Thursday
(T), and Saturday (S) selected as pre-programmed run days.
6. To set Start time (S) and Duration (D) for Auto-Run #1, press Enter
repeatedly to move to Time line #1. Press Up/Down arrows to change
the time and duration values. Press Enter
to toggle through the
fields or press left/right arrows.
7. (Skip this step if not setting auto-run #2.) To set auto-run #2, press
softkey #2 until the screen displays a plus symbol in front of “2”. (This
denotes it is “activated”.) Then repeat steps 5 – 6.
8. To exit the screen, press On/Off/Esc
repeatedly until you return to the
main screen. Press and hold the On/Off/Esc
to power off.
Days field
Auto-run #2 is
programmed to run
Monday –Thursday and
Saturday
Start time and duration
Auto-run #2 is
programmed to run at
2:00pm (“S”) for a duration
(D) of 2 hours
Start time and duration
Auto-run #1 is
programmed to run at
10:00am (“S”) for a
duration (D) of 2 hours
Figure 4-4: Day of the Week (DOW) setup
9. When powered off, an Auto-run shutdown screen will appear. (Please
see section, “Auto-Run shutdown screen”.)
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Setting up auto-run
Auto-run shutdown screen
Auto-run shutdown screen
When either the Date mode or the Date of the Week (DOW) settings is
enabled and you power down the instrument, you will be alerted by an Auto-
Run Shutdown screen just before the instrument turns off. This screen,
illustrated below, appears after the normal power-down countdown and
remains visible for approximately ten seconds.
NOTE: The Auto-Run Shutdown screen never appears when Timed
Run is enabled because that mode requires the instrument to be
powered on.
Auto-Run (AR) #1 settings
• Date is displayed on first line
• Start time (ST) and
Mode
• Either Date/ DOW
runtime(RT) is displayed on
second line
Auto-Run (AR) #2 settings
Displays the # of
pre-programmed runs.
Figure 4-5: Auto-Run Shutdown screen
Auto-run shutdown screen explained
The Auto-Run Shutdown screen is a map of your auto-run settings. It
identifies the mode, the activated setups in that mode (AR) and the order in
which the setups will occur.
If Auto-Run is enabled in the Date mode and more than two setups are
activated, only the first two will be shown because of limited screen space.
If you power on the instrument after the first auto-run has been saved, view
the study, and then power off the SoundPro, it will display the next two
remaining auto-run settings.
NOTE: If the start time and date for a setup is already past, the run will not
be identified in this screen.
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Setting up auto-run
Timed run setting
Timed run setting
In Timed Run mode, you program the instrument’s duration (or timed run)
and then manually start your study, which can be applied as many times as
you wish. The auto-run will end when the duration expires.
Viewing or changing the Timed Run setup
1. From the start screen, press Up/Down
press Enter
to highlight Setup and
.
2. Select Auto-Run by using Up/Down
Enter to select.
to highlight and press
3. In the Auto-Run screen, repeatedly press Enter
until Timed-Run
appears.
4. To set the duration, press Enter
to toggle between the Hours,
Minutes, and Seconds field. To change the time values, press
Up/Down
repeatedly until the specified value is selected.
repeatedly to return to the start screen. When you
5. Press On/Off/Esc
are ready to run your study, press Run/Pause
.
Timed-Run
Auto-run setting with timed
run selected
Duration
Formatted as
Hours:Minutes:Seconds
Figure 4-6: Timed Run setup screen
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Setting up auto-run
Level-triggered auto-on setting
Level-triggered auto-on setting
The level-triggered screen contains meter 1 parameters which include a
Filter mode, Frequency level, “Level On” and “Level Off” modes, and a
specification for either run/stop or run/pause modes.
Viewing or changing level-triggered mode
1. From the start screen, press Up/Down
press Enter
to highlight Setup and
.
2. Select Auto-Run by using Up/Down
Enter to select.
to highlight and press
3. In the Auto-Run screen, repeatedly press Enter
Triggered appears.
until Level-
4. Press the Down arrow to select View/Set Parameters and press
Enter . The Level-Triggered Auto-Run screen will appear.
•
See Table 4-1 below for explanation of settings.
Mode: to enable a
filter mode, select
Level On/Off or
Windowed
\setup\LVL-TRG-RUN
A
MODE
LEVEL ON/OFF
RUN/PSE
Action: Run/Pause
or Run/Stop
B
ACTION
TRIGGER
RUN
PAUSE
Source/Level:
Select one of the 5
features and then
set an appropriate
Level.
C
D
SOURCE
LEVEL
METER 1 METER 2
90.0
OFF
Figure 4-7: Level-Triggered screen
Explanation of Settings
Level-
Triggered
A. Mode
The mode, or Filtered Mode, can be set to Level On/Off and Windowed
settings.
•
In Level On/Off mode, the unit starts a run when the source level
exceeds the specified criteria and stops/pauses when level falls below the
off criteria. The on criteria is met and either pause or stop a run when the
off criteria is met.
•
In Windowed mode, the unit starts a run when the selected criteria falls
outside the defined window. This is intended primarily for curves but can
also be used with broadband or individual filter measurements.
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Setting up auto-run
Level-triggered auto-on setting
Level-
Explanation of Settings
Triggered
B. Action
C. Source
After selecting specific filter mode settings, the instrument is set to trigger
based on Run/Pause mode or Run/Stop mode.
The source can be set to Meter 1, Meter 2, filters, curve, external trigger,
timed run trigger mode, and a delay. which are explained below:
•
Broadband: When selecting Meter 1 or Meter 2 for the triggering source,
you then specify a specific value in the “level” field such as 85dB.
•
Filters: Octave band filters are selectable as a triggering source such as:
12.5Hz, 16Hz, 20Hz through 20KHz. Note: this is only available if they
have purchased the 1/1 or 1/3 features. To select a filter, select a an
octave band value (.i.e. 10KHz) in the source field. Then, select a Level
value (i.e., 90dB).
•
•
Delay: When selecting Delay with a specified time value, it will trigger the
auto-run after the timed-delay surpasses. (This is similar to setting a delay
on a camera.) To select “Delay”, select the Source as “Delay” and for
Level select a specific time value (the range is from 00:01 seconds to
59:00 minutes).
Curve: If the curves feature has been purchased, you have the option of
selecting one of the 4 captured curves to trigger a run. To select a
captured curve, set the Source as “Curve” and then change the “Level”
field to one of the following: CAP-1, CAP-2, CAP-3, or CAP-4.
•
•
EXT: External Trigger feature is triggered by the digital input on the curve
indicator. To select external trigger, select “EXT” as the source field, and
select “LO” for the level field.
TIMED: When selected as the RUN trigger, it will cause a delay of
specified direction between the timed RUN button is pressed and the time
the RUN actually starts. When selected as the PAUSE/STOP trigger, it
sets a run length. To select under the Source and Pause fields, chose
Timed. Next, select a timed value (or duration) in the Level field. (This is
formatted as hours:minutes:seconds.)
D. Level
The level field corresponds with your selection from the Source field and is
explained under “C. Source”.
Table 4-1: Level Triggered Auto-On settings explained
5. To select the Mode, press Enter
either Level On/Off or Windowed.
repeatedly until you are viewing
6. To move to the next field, press the Down arrow.
7. To set the Action, press Enter
repeatedly until you are viewing
either Run/Pause or Run/Stop.
8. To move to the next field press the Down arrow.
9. To change the Source, press the right arrow. To select one of the five
Sources (as explained above in Table 4-1), press Enter
repeatedly
until you are viewing the appropriate feature.
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Locking setup or run mode
Setting secure run or secure setup (locking)
10. To activate Triggered Run on the Meter 2, press the right arrow and
select one of the five sources by pressing Enter
repeatedly until you
are viewing the appropriate feature. (If you are only setting Meter 1,
please skip this step.)
11. To move to the next field press the Down arrow.
12. To select a Level, press the Right arrow. Press Enter
repeatedly
until you are viewing the appropriate setting.
13. Press On/Off/Esc
repeatedly to return to the start screen. When you
are ready to run your study, press Run/Pause
.
Locking setup or run mode
The locking or security feature is designed to lock the SoundPro during a run to
ensure the study will not be stopped unless the lock feature is disabled.
Likewise, this feature includes a locked (or secure) setup mode which will stop a
user from editing a programmed setup. Once setup and enabled, the secure run
or secure setup are unlocked, by pressing the Lock softkey and entering in the
code.
NOTE: Security settings survive a shutdown.
Setting secure run or secure setup (locking)
Run Security and Setup Security are both enabled and disabled in the Lock
screen. For Secure Run, you can be in pause or stop mode when locking.
For Secure Setup, you must be in stop mode to set and enable this feature.
About Secure Run
When you enable Run Mode Security and start a run, the Secure Run Mode
screen appears (Figure 4-10). This will prevent users from viewing the
measurements, changing parameters, and/or stopping the run. To stop the
secured run, you will have to press the Lock softkey and enter in the code. Then,
you would be able to stop the run by pressing the Stop key.
NOTE: With Run Mode security enabled, the Secure Run Mode screen
always appears regardless whether the study was started manually, by Auto-
Run or by Triggered studies.
About Secure Setup
Setup Mode security blocks access to setup screens while in stop mode.
(NOTE: When in run mode, the SoundPro automatically blocks the user from
changing settings to ensure the settings remain the same throughout the
session.) Once enabled and the user selects setup, the Secure Setup mode
prompt will appear and it prevents someone from changing settings until
unlocked.
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Locking setup or run mode
Setting secure run or secure setup (locking)
Setting secure run or secure setup (locking)
1. From the start screen, press the Lock softkey.
Lock:
Press 4th softkey to
select “Lock” screen
Figure 4-8: Secure/Lock option
2. In the Lock screen, there are two selectable fields:
•
•
•
Secure Run Mode with a status line
Secure Setup Mode with a status line.
Each Status Line is used to specify either a “disabled” state or an
enabled state when a code is entered to assign an unlock code.
Setting Lock feature:
•
Enable or Disable “Secure Run Mode”
•
Enable or Disable “Secure Setup Mode”
Figure 4-9: Secure/Lock screen
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Locking setup or run mode
Setting secure run or secure setup (locking)
3. (Skip this step if securing setup and see step 4.) To set Secure Run
Mode, press Enter
and “0000” will appear.
NOTE: if you want to set the code as “0000,” press Enter
repeatedly until “enabled” appears. This will be the unlock code.
• Selected value is shaded
• Enter code by pressing up/down
arrows to change value
• Press enter to move to each field
Figure 4-10: Adding code for secure/lock screen
•
To select a numeric code, press Up/Down arrows to select a
number, press Enter
to toggle between the fields.
•
•
Press Enter to Enable.
Press On/Off/Esc key to return to the Start screen. When you are
ready to run a session, press the Run/Pause key and the Secure
Run Mode prompt will appear. (See “Disabling secure run or secure
setup” below for details on stopping the run.)
To unlock/unsecure
Press lock softkey and
then enter in code.
Figure 4-11: Secure/lock run prompt
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Locking setup or run mode
Disabling secure run or secure setup (unlocking)
4. To set Secure Setup Mode, ensure it is highlighted by pressing Down
arrow. Once selected, press Enter and “0000” will appear. (See Figure
4-10 for a screen example.) (Also, you must be in stop mode.)
•
•
To select a numeric code, press Up/Down arrows to select a
number, press Enter
to toggle between the fields.
Press On/Off/Esc
repeatedly until the Start screen appears.
This will Enable the Secure Setup (or locking setup).
To unlock/unsecure
Press lock softkey and
then enter in code.
Figure 4-12: Secure/lock setup prompt
Disabling secure run or secure setup (unlocking)
You can disable Setup Mode security only when the session is stopped.
From Secure Run or Secure Setup screen
1. Both screens will have a Lock softkey (see Figures 4-11 or 4-12).
2. Press the Lock softkey and the code will appear (see Figure 4-10 for
example).
3. Enter in the code (using Up/Down arrows to change value and Enter to
move to next field).
4. Press Enter to exit the code field. Disabled will appear indicating the
lock feature is turned-off.
Secure code backup number
If you forget your own security code, you can enter “9157” in the template to
disable Secure Run Mode or Setup Mode Security.
From the Start screen
1. In the Start screen, press the Lock softkey. The Lock screen appears.
2. Follow Steps 2-4 above, “Setting secure run or secure setup”, page 47.
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Digital outputs/Triggering
Tracking runs
Digital outputs/Triggering
All digital output signals (also referred to as “Triggering”) appear on pins of
the Auxiliary Port (“Auxiliary port” on page 7). Manage these digital outputs in
the Ext-Trigger screen.
Tracking runs
The instrument can be configured to use a digital output to signal the start or
end of a run.
Enabling or Disabling run/pause digital outputs/triggers
1. From the start screen, press Up/Down
press Enter
to highlight Setup and
.
2. Select Digital-Out by using Up/Down
to highlight and press
Enter
to select.
3. Press
4. Press
to select Output 1.
to enable (Run/Pse) or disable (Off) run tracking.
5. If you enabled and want to reverse the trigger logic, continue below.
Otherwise, skip to step 9.
6. Press
to select Logic 123, then press
to enter the first data
field. The second data field is for Output 1.
7. Press
to select the second data field, then press
to toggle the
logic state. The displayed logic state is for a running study.
8. Press to exit the Logic 123 data field.
9. If finished, press
to exit the screen.
OUTPUT 1
Select Run/Pause to enable
Figure 4-13: Digital-Out screen
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Communications
Digital outputs and SPL
Digital outputs and SPL
The instrument can also be configured to use a digital output to signal if the
current SPL measurements exceeds a specified level.
Managing SPL digital outputs (See Figure 4-13 above)
1. Open the Digital-Out screen, by selecting Setup from the start screen.
(Press
arrows to select Setup and press
.
2. Press
to select Output 2 or Output 3, then press
to move the
cursor to the data field at the right. You have two options for each output.
•
•
OFF - Disables SPL tracking for that output.
dB level - Enables and shows the current setpoint for that output.
3. Press
to toggle between these options. If you select “Off,” press
to exit the data field, then skip to the last step of this procedure. If you
enable the trigger, continue below.
4. Press
5. Press
if you wish, to change the setpoint.
to exit the data field.
6. If satisfied with the trigger logic, skip to the last step of this procedure. To
toggle the logic setting, continue below.
7. Press
to select Logic 123, then press
to enter the first data
field. The third and fourth data fields are for Output 1 and Output 2,
respectively.
8. Press
to select the appropriate data field.
9. Press
to toggle the logic state. The displayed logic state is for SPL
that equals or exceeds the setpoint.
10. Press
to exit the Logic 123 data fields.
11. If finished working in the Ext-Trigger screen, press
to exit the screen.
Communications
The SoundPro has both USB and RS-232 communication channels. The
majority of users should only require USB communications, which is vastly
faster than the RS-232 channel which is intended for low speed modems
GPS applications, and/or log-to-port applications but may be used to
communicate to a PC as well. The optional 053-729 Serial Cable is required
for RS-232 communications.
The SoundPro has two USB communications modes “QSP/Serial and “Mass
Storage.
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Communications
QSP/Serial
QSP/Serial
(Figure 4-14). For QSP-II communications, USB should be set to
“QSP/Serial”. The RS-232 channel should be turned off for low power
consumption.
Figure 4-14: QSP/Serial
Mass Storage
When the USB channel is set for Mass Storage mode the user will have direct
access to the instruments SD card through programs such as “Windows file
manager”. Much the same way a small pocket USB flash drive operates. When
obtaining data from the SoundPro via Mass Storage, it is important to remember
that the data obtained is in Native SoundPro SES format (It cannot be read with
Excel, Word, etc.) A SoundPro SES to XML conversion utility is available.
NOTE: When using Mass storage, the user must use the Windows “Safely Remove
Hardware” feature to un-mount the SoundPro from the PC in the same manner a
user must remove a flash drive. This “Windows” feature is usually found in the lower
right-hand side of the windows systems tray.
Figure 4-15: Mass Storage
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Communications
Viewing real-time measurements remotely
USB communications
1. If a session is running, stop it.
2. In the Start screen, press
screen appears.
to select Setup, then press
. The Setup
3. In the Setup screen, press the arrow keys to select Comm Set, then press
and the Comm-Set screen appears.
4. USB should be Highlighted. Press
“Mass Storage”.
to toggle between “QSP/Serial” and
5. If the RS-232 channel is not set to “Off/Lo-Pwr”, press the left arrow to
highlight RS-232 and repeatedly press until Off/Lo-Pwr is displayed.
6. Press to exit the screen.
7. Connect the small end of the USB cable to the USB port (“Hardware
interfaces” on page 6).
8. Connect the large end of the USB cable to a standard-sized USB connector
on the computer.
Viewing real-time measurements remotely
On the SoundPro, the “Log to Port” feature, provides the functionality to stream
logged data out the serial port at the log rate to an external device (such as a pc).
With this feature, you are able to view logged measurements for broadband as
well as filter band average measurements (depending on the model you
ordered). It will not report Lmax, Lmin, or Lpk for each filter band.
Turning on log to port
1. In the Comm Set screen (selectable via the Set-up screen), select RS-232
field (by pressing the down arrow).
2. Press
repeatedly to turn on LOG PRN.
LOG to Port
Press Enter key repeatedly
to activate
Figure 4-16: Log to Port
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Communications
GPS
GPS
The SoundPro has the capability of embedding GPS information into study
headers. To interface a GPS, you need a GPS receiver with RS-232
communications that conform to NMEA 0183 version 2 and the optional 053-
729 Serial Cable. In many cases, a Male-Male DB-9 null modem connector
will be required as well.
The SoundPro will keep a GPS fix for up to 1 minute before declaring it
invalid at which time “No Fix” will appear if you are in the “COMM-SET”
menu. In other screens where a RUN may be initiated, “GPS +” or “GPS-” is
momentarily flashed in the Right Soft key indicating either a valid fix “GPS +”
or an invalid or timed out fix “GPS-”.
NOTE: GPS time can be viewed in the Comm Set screen but is not used in
the instrument or added to session files. Time and date stamping in session
files uses information that is manually entered (“Time and date” on page 25)
or downloaded from QSP II (“Information screen” on page 8).
GPS display
You can view GPS data in the Comm-Set screen. The position coordinates
are stored in each study, when GPS is enabled and can be viewed with DMS
(see page 9 for details.)
GPS selected
“NO Fix” indicates GPS is not
connected or not reading from
GPS satellite
Figure 4-17: Comm-Set screen for GPS data
GPS explained
The top two screen selections, Interface and Baud Rate, specify the GPS setup,
which is explained under “Enabling GPS communications,” below. The rest of the
information in the screen appears when GPS communications is enabled and
data is being received from a GPS satellite.
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Communications
GPS
•
•
•
Status line - This data field at the right on this line tells you whether GPS is
enabled or not. You may see “No Fix” below this line, which tells you that,
although enabled, the instrument is not receiving the satellite signal.
Position line - When the satellite signal is being received, there will be two
data fields on this line that give the instrument’s latitude (N or S) and
longitude (E or W) position in degrees and minutes.
Other line - When the satellite signal is being received, there will be two
data fields on this line that give the instrument’s altitude and time, in that
order. The altitude is given in meters above mean sea level. The time is
given for Greenwich, England (GMT) and differs in hours from your time by
the number of time zones between your location and Greenwich.
Enabling GPS communications
1. If a session is running, stop it.
2. Connect the RS-232 cable to the GPS receiver and to the auxiliary
port of the SoundPro SE/DL instrument (“Auxiliary port” on page 7).
3. Referring to the user manual for the GPS receiver, prepare the device
to receive satellite signals.
4. In the SoundPro SE/DL Setup screen, press the arrow keys to
select Comm-Set, then press
and the Comm-Set screen
appears.
Viewing GPS coordinates
Figure 4-18: Viewing GPS coordinates in COMM-Set screen
5. Press the down arrow to highlight “RS-232”.
6. Repeatedly press
until “GPS” is displayed. The Baud rate should be kept
at 4800 unless otherwise specified by your GPS manufacturer.
NOTES: If you are not using RS-232 communications in any way, you
should keep the RS-232 channel set to the Off/Lo-Pwr setting.
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Communications
GPS
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57
Virtual meters
Meter 1/Meter 2 explained
5
Preparing to measure & running
This chapter explains the steps needed to prepare the SoundPro for
measuring and how to run measurements. It will also show you sample
measurement result screens and explain the contents of the screens.
Virtual meters
SoundPro SE/DL operates with two parallel measurement systems called
meters. Each meter obtains the same input from the microphone, processes the
information through the same SoundPro SE/DL circuits and displays the
measurement results in the same screens. The differences lie in the parameters
used by each meter to process the signals. You can get different measurement
results by setting the parameters for each meter differently.
Meter 1/Meter 2 explained
Meter 1 and Meter 2 enables you to setup and monitor two instruments in
one (also referred to as a “virtual instrument”). “Meter 1” is the primary
meter. “Meter 2” is the secondary meter. If a filter option is installed in the
instrument, the filtered measurements are associated with “Meter 1” only.
Setting Meter 1/Meter 2 Parameters are explained in Chapter 3. (See Figure
3-4 for a screen example.)
Measurement notation (IEC/ISO)
Many of the instrument’s measurements are labeled in accordance with nota-
tion standardized jointly by the International Electrotechnical Commission
(IEC) and the International Standards Organization (ISO). This notation iden-
tifies the measurement and the meter’s frequency and time response settings
when the measurement was obtained. Table 5-1 provides a couple
measurement examples. For additional information about measurements
and measurement parameters, see Appendix B, “Glossary.”
Notation
LCS
Explanations
SPL measured with C-weighting and slow response.
Average SPL with C-weighting and slow response.
Peak SPL with A-weighting
LCSav
LAPk
LCSMx
Maximum SPL with C-weighting and slow response.
LCSMn
Minimum SPL with C-weighting and slow response.
Table 5-1: Measurement notations
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Overview of running a session/study
Meter 1/Meter 2 explained
Overview of running a session/study
The list below is a brief overview of the steps for running a study.
Quick Help List
1. Turn the SoundPro on and check your battery power. (See Chapter 1).
2. Format the card or delete session files from the SoundPro.
o
Formatting the card will clear out all of data before your study begins.
Choosing to select specific session files and delete will also clean up
the instrument’s sessions. (See Chapter 7).
3. Adjust your settings to fit the specifications of your sound study. (See
Chapter 4 and Chapter 6)
4. Set the measurement range (Chapter 5)
5. Calibrate the SoundPro (Chapter 5)
6. Position the SoundPro in the field and connect appropriate external
devices if applicable.
7. Press the Run/Pause key to start the session. (Chapter 5)
8. To Pause the session (if needed) press the Run/Pause key. (Chapter 5)
9. When you are ready to end your session/study, press the Stop key.
NOTE: You must be in pause mode to stop a session/study. (Chapter 5)
10. Review your measurement results on the SoundPro display (Chapter 5).
Or view results in QSP-II, see Communicating in Chapter 8.
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Preparing to measure
Sessions and Studies
Preparing to measure
Sessions and Studies
Before you begin running a session/study, there are a couple items to consider:
•
Understanding sessions and studies
Adjusting the measurement range before running a study
Calibrating the instrument
The following components explain how the data is stored on the instrument.
•
•
Storing Data
Session
Explanations
A session is comprised of one or more studies and uses data
derived or accumulated from those studies to arrive at session
results. The measurements in a session are the same ones
made in each study in the session. For example, the maximum
SPL determined for each study in a session is compared to the
maximums for each other study in the session to determine the
maximum SPL for the entire session. Likewise, an average or an
accumulation for a study is continued using data from
subsequent studies in the session to arrive at the corresponding
average or accumulation for the entire session.
Studies
Studies are periods in a session during which measurements
are acquired, processed and saved by the instrument. The
duration of each study period is called the study’s run time.
You will be running a sound test in a machine shop. Your main
objective is to determine the noise in three different work areas
of the plant which include two different machinist areas and a
welding area. You set the SoundPro to run and pause three
times at one-hour intervals. When the tests are completed, you
upload the data into QSP-II. The tests will store as one
“Session” under “Downloaded” node and each one-hour test is
denoted as a “Study”.
Session and
Study Scenario
Table 5-2: Sessions and studies explained
CAUTION: The memory card should not be inserted or removed during a study—
you can lose data.
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Preparing to measure
Measurement range
Measurement range
You select the decibel range before running the first study in the session.
Setting the measurement range helps keep the desired measurements within
the linear range of operation. If you don’t make an optimal range selection,
low levels of sound can be hidden in the instrument noise (below the noise
floor of the instrument), and high levels of sound can be distorted (the
instrument is “overloaded”). Measurements at these extremes are invalid. For
information about these and other terms that may be unfamiliar to you, see
the glossary in this manual (Appendix B, “Glossary”).
Measurement range selection
1. From Start screen, select either View Current Study or View Session.
The bar chart screen appears. To select, press arrows and then
press
.
-
NOTE: The bar chart screen may appear with a different measurement
displayed and a different range. This is dependent on the settings you
may have selected. (For more information, please see “Measurement
Type”, on page 26)
2. (Depending on if you selected basic SLM or applied 1/1 or 1/3 octave
band filters) a bar chart screen or a filtered bar chart screen will appear,
press
. This changes the range, and the change is confirmed in
the screen in two ways.
• Ranges - A different range may appear each time you press an arrow key.
The instrument provides eight selectable ranges, each with different minimum
and maximum values. (For more information about ranges, please see
“Ranges” in the Specifications in Appendix A, on page 123).
•
SPL value – Depending on if you have the instrument set to measure basic
sound level measurements (see “A” below) or filtered sound level
measurements (see “B” below), the following two types of screens may
appear. The level increases or decreases in relation to the range selection
Range
Range
Figure 5-1: Bar chart screen (A) and Filtered Bar Chart (B)
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Calibrate
Calibration screen
Calibrate
3M recommends calibrating your Verifier before you run a STI-PA
measurement and after to ensure highly accurate measurement results.
The microphone should be calibrated before use for a number of reasons.
First, the microphone is sensitive to humidity and pressure changes.
Calibrating before taking measurements assures that your level
measurements are accurate for the current environment. Performing a
calibration verification (post-cal) allows you to verify that conditions have not
significantly affected your readings.
Calibrating also serves the dual purpose of checking the microphone for
significant damage, such as a torn or contaminated diaphragm.
You can calibrate the instrument in the field with reference to the output of a
calibrated sound source. 3M offers a line of acoustic calibrators that are
available (such as the QC10/20).
Calibration screen
The Calibration screen contains a calibration option, called Calibrate, and a
Calibration History. The history shows Pre-Calibration (Pre-Cal) and Post-
Calibration (Post-Cal) results for previous calibrations, as applicable. For
each calibration type, the resulting SPL level is shown along with the time
and the date of the calibration.
Pre-Calibration
The main reason to calibrate is to adjust the current microphone reading to
match a reference input, usually provided by a calibrator.
A Pre-Calibration is conducted when the session is stopped. When you
calibrate during a stopped session, the new calibration results replace the
previous Pre-Calibration results and the Post-Calibration results are
removed. You will always see the last Pre- Calibration results.
Post-Calibration
A post-cal is really a calibration verification; that is, it does not change the
instrument’s calibration. It compares the microphone's current level with the
value read from the last calibration (assuming that the same source is used).
A Post-Calibration is a calibration done during a session pause. When you
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Calibrate
Performing a calibration
calibrate during a pause, the new calibration results replace the previous Post-
Calibration results without affecting the Pre-Calibration results. You will not
see Post-Calibration results if a pre- calibration was performed but not
followed by a Post-Calibration.
Performing a calibration
Before beginning your calibration, ensure the calibrator has sufficient battery
power to perform the calibration. Also, you will want to insert the “cal adapter”
into the mouth of the calibrator.
If the SoundPro has a windscreen, please remove.
Calibrating
1. Ensure the SoundPro is turned On and is either stopped or paused.
2. Attach the calibrator and cal adapter to the SoundPro. Set the calibrator to 1
KHz and 114 dB (if it is a selectable).
Microphone
Place calibrator
over microphone
Cal Adapter
Insert into cavity of
QC10/QC20
QC10/QC20
Select 1kHz and 114 dB
Figure 5-2: Attaching calibrator to SoundPro
3. From the Start screen, press the Cal softkey and the Cal screen will open.
4. Select Calibrate by pressing
Arrows (if not selected) and press Enter
to open the Pre-Cal screen.
5. Switch On the Calibrator.
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Calibrate
Performing a calibration
Measurement value
displayed graphically
Measurement
value
Press up/down softkey to
increase/decrease cal value
Figure 5-3: Setting pre-cal screen
6. Allow the measurement to stabilize and then press
dB level.
Arrows to set 114.0
7. Press Enter
to store the new calibration. The Calibration History screen will
appear with the new calibration values in the display.
Pre-Cal
Displays pre-
calibration
information
Figure 5-4: Calibration history screen
8. Press On/Off/Esc key to exit the Cal screen.
9. For a Post Calibration, ensure the SoundPro is in “Pause” mode. (Essentially,
run a measurement and press the run/pause key.) The Pause indicator will
appear at the top of the display.) Then repeat the Calibration steps above and
press Enter to store the Post Calibration information. A sample screen is
displayed below with post calibration history.
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Running a session/study
Performing a calibration
Pause indicator
Post-Cal
Displays post-
calibration
information
Figure 5-5: Post-Calibrate history screen
Running a session/study
You run a “session”, commonly called opening a session, by running (or
starting) the first measurement. To run a “study”, you would press pause and
then proceed in the run mode. This would save the measurement as a
“study”. Studies will be saved as you continue to run and pause your
measurements. Once stopped, this will save as one session.
Running a session/study
1. From the Start screen, select either View Session or select View
Current Study.
2. To select, press
arrows and then press
.
3. Press to begin measuring. A session is currently open for the
instrument when either the Run icon or the Pause icon appears in the
Status Area at the top of the screen.
RunTime
Run icon
Battery icon
Lookup softkey
Figure 5-6: Bar Chart screen in run mode
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Measurement navigation
Using softkeys in measurement screens
NOTE: The Lookup softkey is used to change the measurement options.
There are five selections which include: SPL, Leq, Lpk, Lmax, Lmin.(See
“Changing displayed measurement” for more information, on page 66.)
Measurement navigation
You can navigate through the measurement screens by repeatedly
pressing
. The first screen you encounter when viewing a measurement
screen is a bar chart or filtered bar chart screen. The subsequent screens
that appear depend upon the measurement setup, the meter selection and
the type of analysis. There are four possible screen types:
Measurement
screens
Explanations
Depending on if you selected SLM, 1/1 octave, or 1/3 octave,
one of these screens will appear.
Bar Chart or
Filtered Bar
Chart
Available for Meter 1 only. If your instrument contains a filter
option and is set to an octave or third-octave analysis type, the
screen that appears next in order after the Bar Chart is a
Tabular screen. There may be one or more additional Tabular
screens depending upon the analysis type that’s in effect.
Tabular screen
Dosimetry
screen
Available for both meters, all viewing areas and all instrument
types.
Available only for Meter 1 and all instrument types, but not for
studies. This screen will not appear when viewing the current
study.
Community
screen
Available for both meters, but only for broadband studies.
Time Log
screen
Table 5-3: Measurement screens explained
NOTE: If you’re not running a study when you enter a viewing area, only the SPL
measurement is being measured and is available for viewing. The values for any
other measurement in the Selection Panel discussed under, “Changing displayed
measurement”, are replaced by dashed lines.
Using softkeys in measurement screens
The softkeys function in relation to the contents
of the Softkey Region of the display. To use the
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Measurement navigation
Using softkeys in measurement screens
softkeys, the menus are visible in Softkey Region (i.e., “Cal” for Calibration menu). If
necessary, press the Alternate Functions key (
Softkey Region.
) to toggle the contents of the
Changing displayed measurement
You can change the displayed measurement in any viewing area at any time. There
are five measurement options available: SPL (L_), average SPL (L_av or L_eq
depending upon the exchange rate setting for the selected meter), peak SPL (L_Pk),
maximum SPL (L_Mx) and minimum SPL (L_Mn). The labels comply with IEC/ISO
notation (“IEC/ISO notation” on page 57), where the underline character represents
the time response and frequency weighting settings for the selected meter.
Changing displayed measurement
1. If necessary, press
labels.
(Alternate Functions key) to show the softkey
2. Press the
softkey to display the Selection Panel. The available
measurements are arranged in a column, with the selected measurement
marked.
Selection Panel
This appears when lookup softkey is
pressed.
•
The diamond symbol uindicates
which measurement is selected.
(L_eq). Press Enter key to confirm
new selection.
Lookup softkey
Figure 5-7: Selecting measurements with Lookup softkey
3. Press
4. With your selection marked, press
change effective.
to make a different selection.
or press
to make the
NOTE: When viewing during broadband analysis, you can use the left/ right arrow
keys to change measurements.
Analysis type, time response and weighting
If your instrument has a filtering option, you can change the analysis type. To
change the analysis type, time response, and/or weighting, you must be in the
View Current Studies screen or in the View Session screen. Also, the current
session must be stopped (or “closed”). For more details on changing these
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Measurement screen icons
Descriptor types
options, please see “Measurement type” on page 26 and “Meter 1/Meter 2
parameters” on page 27.)
Measurement screen icons
The measurement screen descriptors and icons identify certain conditions that exist
currently in the display. Press
(Alternate Functions key) to toggle the contents of
the Softkey Region until you see the Viewing Descriptors. When the Viewing
Descriptors are displayed, an Alternate Functions icon appears below the battery
icon.
The Broadband chart figure below displays an example of these icons and
descriptors.
Alternate
functions icon
Stop icon
Viewing
descriptors
Figure 5-8: Example measurement icons & descriptors
Descriptor types
Viewing
Explanations
Descriptors
Session identification. This field tells you the name of the
session that you’re viewing, either the current one or the one
you loaded before entering the viewing area
Study identification. This field, which appears only when you’re
viewing a study, identifies the sequential number of the study in
the session (01-99).
SS
SY
M
Measurement label. This field identifies the displayed
measurement in IEC/ISO notation.
Table 5-4: Measurement icons and screen descriptors explained
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Measurement screens
Bar Chart and Filtered Bar Chart
Measurement screens
Bar Chart and Filtered Bar Chart
The first screen you’ll see in a viewing area contains a bar chart for broadband or
filtered measurements.
For the bar chart screen, the amplitude of the displayed measurement is shown
both graphically by the length of the bar and numerically below the bar. The bar
appears (and usually fluctuates) if the measured value is above the minimum
value for the selected measurement range.
For the filtered bar chart screen, the dominant characteristic of this screen is
the multi-element bar chart. The chart shows measurements in each filter band
and broadband values for both meters. That means that for octave analysis the
screen contains 13 bars (11 for filters and 2 for broadband), and for third-octave
analysis the screen contains 35 bars (33 for filters and 2 for broadband). A bars
appears (and usually fluctuate) if the measured value for the bar is above the
minimum value for the selected measurement range.
Bar Chart View
Shows SPL average value of Meter 1.
•
Will display only if SLM is selected as
the measurement mode.
Softkeys (menus options)
Amplitude in the band
Broadband Bar Chart view
Shows SPL average amplitude
(or value) of Meter 1
•
Will display only if octave
band is enabled
Selected band
Broadband amplitude
Softkeys (menus options)
Figure 5-9: Bar Chart screen and Filtered Bar Chart screen
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Measurement screens
Community Noise screen
Making changes to the Bar Chart or Filtered Bar Chart screen
1. The Range - The scale, shown above the chart, is fixed and cannot be changed
in the run or pause mode (or if you are viewing past studies). If the session is in
stop mode (or closed), press
to change the range.
2. Softkeys- If the session is in run, pause or stop mode you can change the
following: Measurement displayed (via the lookup softkey) or Meter 1/Meter 2
screen. If the session is stopped (or closed), then you can also change the
response time and weighting.
Community Noise screen
This screen shows the results of measurements commonly associated with
community noise studies. Results are only available in this screen for those
measurements that are activated for the current session on meter 1.
The screen components are explained in detail in the “Measurement setup
for Community Noise” on pages 28-29.
Community Noise View
Only appears on Meter 1 when
you are not viewing the current
study and when the community
noise parameters are activated.
Exceedance levels
•
•
•
L1 = 99% dB
L10 = 85.1% dB
L50 = 82.9% dB
Taxtmaximal
•
Value is 90 dB at 3 sec.
intervals
Figure 5-10: Community Noise screen
NOTE: Community noise measures are determined only for sessions, not for
studies, so you will not see this screen when viewing current studies.
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Measurement screens
Dosimetry screen
Dosimetry screen
The Dosimetry screen provides several types of measurements of the accumu-
lated personal exposure to noise. See “Setting logging options” on page 32 for
details.
Dosimetry View
Shows accumulated personal
exposure to noise.
•
These measurements are affected
by the settings in the “Meter Set”
screen.
Figure 5-11: Dosimetry screen
Dosimetry measurements
Dosimetry measurements depend upon the run time—the longer the run time the
greater the accumulated dose. Accordingly, dose measurements will either
remain the same or grow during a study or session. They are determined from
broadband data regardless of the selected analysis type.
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Measurement screens
Tabulation screens
Tabulation screens
The Tabulation screen shows measurements for two broadband
measurements and for all the bands for the selected analysis type. For
octave analysis, all bands are visible in a single tabulation screen. When
viewing third-octave analysis, however, it takes three screens to display the
tabulated measurements for all bands. Press to
cycle through them.
Tabulation view
Shows the average SPL on Meter 1
only.
• Only available if a filter option and
1/1 or 1/3 octave band is enabled
on your meter.
Figure 5-12: Tabulation screen for octave filtering
1/1 and 1/3 octave analysis measurement results
•
Measurements and meters - All tabulated values in this screen are for
the displayed measurement and the selected meter.
•
Broadband measurements - The first measurement in the screen is a
broadband measurement for the selected meter. Following that
measurement, is the number of the selected meter (Meter 1 in this
example).
•
Filtered measurements - After the broadband measurement, all other
measurements given in the display are for Meter 1 in each of the
frequency bands according to the type of analysis performed. For each
band, the center frequency of the band is given and the measurement in
that band is given at the right of the band’s identification.
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Time History/Back-erase screen
Tabulation screens
Time History/Back-erase screen
When conducting a broadband study, you can view as much as the last 20
seconds of Max SPL in this screen. The current Max appears at the right
border of the Time Log chart (time=0) and advances, in one-second
increments, toward the left border of the chart. The data leaving the chart at
the left border is always a measurement that occurred 20 seconds ago.
Figure 5-13: Back-erasing
Back-erasing
You can remove undesirable data at the end of a study with a process called
back-erasing. Back-erasing is available only under these conditions.
•
•
Analysis type - Back-erasing is unavailable for filtered studies.
Viewing areas - You must be in either the View Current Studies or
View Session viewing area. Back-erasing is not available in View Past
Studies.
•
•
Restricted to the pause -You can back-erase only during the pause that
follows a study. Back-erasing is not available for past studies in the
session.
Not all studies - Because back-erasing requires a manual intervention, it
is unavailable for triggered or Auto-Run studies.
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Back-erasing
Results of back-erasing
Results of back-erasing
Back erasing causes the following changes to the study and to the session in
which the study occurs.
•
Run times - The run time of the back-erased study is shortened by
the duration of the removed segment. The run time of the session is
also reduced by the same amount.
•
Measurements - All measurements that use data that was removed
by back-erasing are corrected, as appropriate. For example, if the
maximum SPL had occurred in that erased segment, the instrument
re-evaluates the remaining data in the study to find a different
maximum value.
•
•
Meters - Back-erasing applies on the same basis to both meters.
Storage - The session file is corrected to reflect the new run times
and other changes that resulted from the back-erasing.
•
Back erased raw data - The raw data that you removed by back-
erasing is saved in the session’s file. You can post-edit back-erased
data with DMS software.
How to back-erase
1. While running a study, view the Time Log screen in either the View
Current Study or the View Session viewing area.
2. If you see data that you would like to remove from the study, press the
pause key to pause the study.
3. Press the left arrow to move the back-erase Time Line from right to left.
With reference to the Time Log figure below, the Time Line starts at the
Zero Marker and can be moved all the way across the screen to the 20-
second Marker. All of these characteristics help you identify the segment
to be back- erased.
•
•
Zero Marker - Identifies the end of the back-erased segment. This is
always the end of the study.
Time Line - Identifies the beginning of the back-erased segment.
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Back-erasing
Results of back-erasing
•
Duration - The length, in time, of the segment to be back-erased is
given in the Softkey Region of the display.
Figure 5-14: Time Log screen
4. You can adjust the Time Line by pressing
.
5. When you have the Time Line in position, press
. The Time Line
disappears and the softkey labels appear in the Softkey Region of the
display.
6. To cancel this screen, press
to begin the process again. The Time
Line will reappear and you can select a different segment to back-erase.
NOTE: At anytime you can leave the time log screen, and return another
time to edit the back-erase segment provided that you have not started
another study.
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Back-erasing
Stopping a session
Stopping a session
You can stop the session manually or with a trigger command, but only when
the instrument is in the Pause state. When the session is stopped, the Stop
icon
appears in the Status Area and the RunTime clock is zeroed. For
information about using triggers, see “Digital Outputs/Triggers” on page 50.
Stopping a session is sometimes referred to as “closing the session.”
Conversely, a session is often described as “open” when the instrument is
either in a run or pause state.
Stopping and pausing
A manual session stop is a little different from a study pause. To pause a
study, , you simply press the Run/Pause key and the command is immediately
executed. To stop a session, , however, you need to press and hold the Stop
key.
If you don’t press and hold the stop key for the 3-second countdown period, the
stop command is ignored and the session remains open. If you hold throughout
the countdown, the following events occur in proper sequence.
Stop icon
Stop key
Run/Pause key
Figure 5-15: Stopping and pausing
•
•
Stopped - The session is stopped.
Transferred - The session data in memory is transferred to the memory
card.
•
Cleared - The instrument’s memory is cleared of session data.
Zeroed - The RunTime clock is cleared to zero.
•
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Back-erasing
Stopping a session
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CHAPTER
77
Additional options
Reverberation
6
RT60, Curves, and STI-PA
Additional options
In this chapter, it is important to note that these features are additional add-on
options and may not be available on your SoundPro model unless you
specifically purchased these features.
Please see 3M’s website 3m.com/detection for more information:
•
•
•
Reverberation
STI-PA
Curves
Reverberation
Reverberation is the distribution of sound in an enclosed space after the sound is
removed or decayed. How is reverberation, or reverb, created in enclosed spaces? A
sound is generated in an enclosed structure with a combination of the direct sound
source (which travels from the sound source to listener by the shortest path without
interfering with room surfaces) and the reflected indirect sound source. The total
sound source echoes and decays as the sound is absorbed by the materials in the
room (i.e., walls, carpet, furniture, concrete, etc...) and air. This is noticeable when the
can no longer be heard.
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Additional options
Reverberation time (RT60)
Reverberation time (RT60)
Reverberation time is a measurement used to evaluate and measure sound decay in
a specific space, tailored to speech or music, such as: classrooms, auditoriums,
gymnasiums, concert halls/theatres, (etc..). For room acoustic, results are used to
ensure quality sound is evenly dispersed throughout a specific room with limited
echoes/refractions. For music or performance auditoriums (i.e., symphonies), higher
reverb. time is preferred so the ending results are more robust.
The Reverberation Time over each octave band can be analyzed using a decay
curve. Each octave band shows the time of sound at the start and after the activation
of the noise system using either interrupted or impulse sound methods.
The example below displays the Reverberation Time in an enclosed room. How it is
measured with the impulse method: (1) A starter gun provides a broad impulsive
spectrum noise at 110 dB. The instrument automatically begins plotting the sound
decay (see dB level 1) and stops as the noise falls off (see dB level 2). Hence, the
rate of decay is calculated from decay curve (or regression line) which will give you the
rate of decay in the room. The RT60 measurement is calculated with the Txx time
(i.e., T20) factored in and extrapolated to a 60 dB drop.
dB level 1
Decay Curve
Drop of sound pressure
from Maximum to its
ambient background level.
dB level2
Figure 6-1: Reverb Time
Reverberation (RT60) methods
The two methods supported by the SoundPro are the Interrupted noise method
and the Impulse noise method. While the initial sound source used is different,
the ending decay curve results are very similar providing accurate RT60
measurements.
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Additional options
Reverberation (RT60) methods
Interrupted noise
The Interrupted noise method, applied with pink noise, is used with a portable
sound system, such as a dodecahedral speaker, or with an existing sound system
(only recommended if the sound system has a quality, omni-directional, sound
system.) With the interrupted noise method, the sound source emits a high-level
source and falls-off, returning to its original ambient background level. The Reverb
Time is measured between T1 and T2 indicators with an ending RT60 time value.
NOTE: T1 is calculated from two reference points on the regression line to
ensure an accurate sound level capture
T1
T2
Background
noise level
Figure 6-2: Interrupted noise example
Impulse noise
The Impulse noise method requires a broad-spectrum impulsive noise source, such
as a starter pistol, in a room to be tested. Typically, the RT60 decay start will begin
at a high-level source and decays, reporting a Reverberberation Time.
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Additional options
Reverberation options
Reverberation options
The following setup options are selectable via the Reverberation Time
Options Setup menu (displayed in Figure 6-3).
Field Description
Explanation of field selections
Method -
Interrupted – (This is the default method setting.)
Selecting the
calculation process
of RT60 reverb
time.
Interrupted method uses a constant sound source (i.e., dodecahedral
speaker), waiting for the level to stabilize, and then the source is turned
off. (The method uses random noise or pink noise to test reverb. time.)
Impulse – Impulse method is when the user tests the room with a
broad spectrum impulsive noise, such as a starter pistol or a balloon
popping.
Averaging –
Measurement – The RT60 result times for each filter band of the 1/1
Octave or 1/3 Octave modes are averaged across the studies to arrive at
a session average RT60 for that frequency band.
Selecting how it will
calculate Average
for Reverb-time
Ensemble - The decay curves for each filter band of the 1/1 Octave or
1/3 Octave modes are averaged across the studies to arrive at an
average session decay curve for that frequency band that is then used to
calculate the session RT60 for that band. This results in either eight or
twenty-four session ensembles, one for each frequency band in 1/1
Octave or 1/3 Octave modes, respectively.
Threshold -
Auto - (This is the default threshold setting.) The instrument will
automatically chose the level and calculate RT60. When in run mode, it
sets the threshold relative to the noise level in the room. It provides a
trigger level which is customized to each band.
Specifies the dB
level for triggering
the start or run of
the instrument. The
interpretation of this 40 dB – 140 dB (in 1dB increments). The threshold decibel is user-
field is dependent
on the
measurement
method.
selectable between 40 dB to 140 dB in one decibel increments.
• For Interrupted Noise method, level below this threshold will trigger
the start of a measurement.
• For Impulse method, levels above this threshold will trigger the start
of a measurement.
Measure -
The expected
decay value
Auto - (This is the default Measure setting.) The instrument will
automatically pick the best Txx value based on the expected decay (i.e.,
T20).
T60 (T10 – T60) – (The default setting is Auto.) The selected “Txx”
value is the actual amount of drop/decay the instrument measured. The
selectable ranges are T10-T60.
Filters -
1/1 or 1/3 bands
Measurements are plotted and stored in 1/1 or 1/3 octave band chart
and decay chart. This field is only selectable if both 1/1 and 1/3 octave
filter bands are installed features. Otherwise, the instrument will apply
the installed filter.
Table 6-1: Reverberation time set-up options
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Additional options
Setting up reverberation
Setting up reverberation
The Reverb Time screen is used to change or view your reverberation settings.
The steps below outline how to change the parameters. Please review Table 6-1:
“Reverb time set-up options” for an explanation of parameters.
1. From the start screen, select Setup (by using
Arrows) & press
.
2. Select Options menu (by using
3. Select Reverb Time (by using
Arrows) and press
Arrows) and press
.
.
4. In the Reverb Time screen to change the settings, follow below:
•
•
•
To change the Method field, press
to switch between
“Interrupted” or “Impulse” (when Method is selected).
To change the Averaging field, press
to switch between
“Measurement” or “Ensemble” (when Averaging is selected).
To change the Threshold, press
. Press
to toggle between
“Auto” or a “dB” level value. To change the dB level, press
Arrows to a specific decibel level is selected (i.e., 80 dB) (when
Threshold is selected).
•
•
To change the Measure field, press
an “RT” value is selected (when Measure is selected). To change,
press Arrows to a specific decibel level is selected (i.e., 80
to toggle between “Auto” or
dB) (when Threshold is selected).
To change the Filters field, press
“1/3” (when Filters is selected).
to switch between “1/1” or
Reverb Time options
a. Method field
a
b
b. Averaging field
c. Threshold field
c
d
e
d. Measure field
e. Filters field
Figure 6-3: Reverb Time Setup screen
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Additional options
Running reverberation test
Running reverberation test
There are a couple factors to consider when conducting a reverberation test.
Depending on if you will be measuring voice in a room, hall, theatre (etc..), ISO
3382 standard recommends measuring reverberation time for speech from 63 HZ
to 4 kHz. However for rooms with other intentions (i.e., music/acoustical
concerts), one-third octave bands from 100 Hz to 5 kHz can be used/applied. ISO
3382 also recommends a minimum number of recorded studies in order to obtain
a reliable reverb measurement session. This is done for two reasons: (1)
because the test signal is random noise, there will be a bit of run-to-run variance.
By taking a number of measurements from the same location and averaging them
together, you get a more reliable estimate of the actual measurement (2)
Because the acoustics in a room may vary, it is suggested to do spatial averaging
- taking measurements from multiple locations in the room and average them
together to get an average measurement for the room.
Once the setup options are selected, please follow the procedures below to run
and view RT60 measurements.
Reverberation (RT60) Test
1. Select setup parameters via the Reverb Time screen (see “Setting up
Reverberation” above).
2. (Skip this step if threshold is set to “Auto”.) View the ambient noise in the room
(the LZMAXvalue) and note the value. (NOTE: To ensure a decay curve, at least
45 dB above background noise level is recommended.)
•
To view the ambient sound in the room do one of the following:
(A) From the Start screen, select SLM as the measurement type and
select View Current Study.
•
Verify that the range setting is appropriate for the level being
measured. It is desirable to select the longest range that will not
overload. Press Up/Down Arrows to change range. (For more
details, please see “Measurement range”, page 60.)
•
Press Run/Pause key and notate the average level. (NOTE:
you may need to press the Look-up
softkey and select
Leq to view the average ambient sound level. For more
information please refer to, “Changing displayed
measurements”.) When completed, press Run/Pause key and
then press Stop key to end the session.
(B) Follow “A” above but select 1/1 or 1/3 as the measurement type.
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Additional options
Reverberation results
3. Select RT60 as the measurement mode from the Start screen.
Measurement type
Select RT60 for
Reverb testing
Figure 6-4: Reverb Time Setup screen
4. , Please choose one of the following methods to conduct your test:
• Interrupted Method: Pump noise through room with existing sound
system or a portable sound system. Allow level to stabilize. Then press
Run
.
• Impulse Method: Press Run
. Impulse the room with a broad
spectrum impulsive noise (i.e., starter gun).
5. Depending on your Setup options, the Reverb Time will automatically
trigger and record the results.
NOTE: You may want to repeat this process a few times to ensure the
readings are accurate. Once the RT60 is captured, a pause indicator will
appear at the top of the screen. To run another study, press the run key
again and follow step 4. Or if you do not want to combine all of the
run/pauses into a session, press Stop and then Proceed with the Run key
and follow step 4.
Reverberation results
There are three viewable screen reverberation results which include the RT60
Summary chart, Decay Curve screen, and the Tabular Summary screen.
When the SoundPro is in pause mode, you can view the charts and graphs by
toggling through the screens via the Enter key. If you will be running multiple
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Additional options
Reverberation results
studies, you may want to review the data at the end of the session. In this
example, you would access the File\Session\Data File screen and select a
past study. (For more information, see “Viewing past sessions/studies” in
Chapter 7.)
RT60 summary screen
This is a vertical bar chart that will plot the T60 values taken from each octave
band or 1/3 octave band.
Viewing RT60 values of each band
1. The decay value for each specific band is viewable by pressing the
left/right arrow keys.
NOTE: Bands with invalid T60 values will show dashes (---) instead of a
value.
RT60 bar chart
Overall RT60 value of
selected band.
Selected band
T60(20)
Filter band results
Displays the RT60 filter
band frequency values
States that T60
measurement was
extrapolated from a
T
20 measure.
Decay (To view decay
results, press softkey)
Figure 6-5: RT60 bar chart screen
Deleting RT60 value in a filtered band
This optional feature allows you to delete a selected filtered band from the
session average and is available when in review mode of “view current study”
screens. (This may be used, if for example, you had someone accidentally
walk in during your test and begin speaking. You could delete the bands
which interfered with your test from the RT60 average results.)
1. To delete a filtered band, select either the RT60 Summary screen or the
Decay curve screen.
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Additional options
Reverberation results
2. Select the band to be deleted (by pressing left or right arrows.)
3. Press the Delete softkey. (Repeat steps if you wish to delete more
bands.)
Decay curve screen
This chart displays the (average or ensemble) results of a single Reverb
Decay curve from the study (i.e., one filter band)/or the average of all studies
within that session. (For more information, refer to “Sessions and Studies” in
Chapter 5).
Viewing decay value of each band
1. The decay value for each specific band is viewable by pressing the
left/right arrow keys.
Overall decay time
Sound pressure level
Decay curve
RT60 (To view RT60
results, press softkey)
Figure 6-6: Decay curve screen
NOTE: To delete a curve, please see “Deleting RT60 value in a filtered
band” above.
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Additional options
Reverberation results
Tabular RT60 screen
This is a table-formatted screen which details a summary of the Reverb Decay
Curve of each band. The following table is a brief summary of the tabular data.
Column
Freq
Explanation of data
The Frequency column displays the chosen filter bands (for 1/1 Octave the
range is 63Hz – 8KHz and for 1/3 Octave the range is 50Hz – 10KHz).
T60
T60 column displays the results of the decay curve in seconds.
R2
R2 column displays the reverberation time measurements. The values
represent a “goodness to fit” ranging between 0 to 1 values, where 0 = failed
and 1 = perfect.
Txx column displays the actual measurements of the RT60s’ values.
Txx
Table 6-2: Tabular RT60 field explanation
Summary of the Reverb
Decay curve results for each
octave band.
NOTE: The Txx value may show
different ranges when “Auto” is
selected for the trigger mode.
Figure 6-7: Tabular octave filtering RT screen
NOTE: if “---”dashes appear, this indicates the measurement values are
invalid.
Viewing Tabulation RT60 screen
1. To view all of the octave band filters, press the Up/Down Arrow keys to
page through the filters’ data results.
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Curves
Captured curve applications
Curves
Curves, also referred to as “Acoustic Spectral Curves”, is used to evaluate
the quality of noise in new or existing buildings. The SoundPro models SE
and DL support the following:
•
Captured curves
•
Noise Criterion curves: NC curves, PNC curves, NCB curves, NR
curves, RC curves,
•
Audiometric Booth Background Curves: ANSI 53.1, OSHA, and ISO
AM Booth
Captured curves
Captured Curves, is a user-defined criterion curve, which allows the user to
make a measurement with a 1/1 octave band frequency or a 1/3 octave band
frequency distribution and save or capture the spectral curve. This snapshot
can be displayed in DMS as a baseline or reference curve. A new
measurement is then made and superimposed over the captured baseline
curve to illustrate octave band frequency deviations from the original
distribution, creating a user-defined criterion curve. This may be kept just as
a reference, or it may be used as an evaluation for product or process
comparisons, job task risk assessments, environmental investigations, and
other applications.
Captured curve applications
Application 1 - Baseline: Applying a captured curve as a baseline or reference
curve for noise abatement investigation.
•
The operator captures the original noise and then makes various changes to the
machine and/or enclosure and looks to see how much of a difference the change
made.
Application 2- Quality Control: Using a captured curve as a Quality Control (QC)
evaluation. The instrument has been pre-loaded with a sound curve that represents
the allowable levels for some product.
•
Once the product comes off the assembly line, it runs and the measurements are
compared to the allowable levels. If levels exceed the curve, it is sent back for
rework.
Application 3: Process monitoring: A set of machinery is monitored to watch for
changes in the operating sound.
•
If the measured sound exceeds the sound curve, it is an indication to the operator
that “something bad” is happening (i.e., over exposure) and he needs to shut
things down and call maintenance before more damage occurs.
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Captured curves
Setting up captured curves
Setting up captured curves
Setting up Captured Curves Settings and measurement settings
1. From the start screen, select either 1/1 octave or 1/3 octave for the
measurement type. (Repeatedly press first softkey.)
Selecting Measurement type
Press first softkey until 1/1 or 1/3
is selected
Figure 6-8: Selecting measurement type for curves
2. Next, select the measurement type, by selecting View Session (use
Up/Down Arrow to select) and press Enter
. Select the appropriate
meter 1 settings (using the softkeys) and set the response time, weighting,
and measurement type. (See Figure 3-4, page 27 for an example).
NOTE: It is recommended to set Meter 1 to Slow response, Z-weighting, and
measurement to Leq.
3. Press On/Off/Esc
to return to the start screen.
4. Select Setup (use up/down arrows to highlight) and press Enter
.
5. Select Options menu (use up/down arrows to highlight)and press Enter
6. Select Curves menu (use up/down arrows to highlight) and press Enter
.
.
7. For the Mode, press Enter
repeatedly to select either Survey or
Evaluation setting. (Please see explanation below).
•
Survey Mode: dynamically evaluates the noise and reports the
appropriate noise curve. Typically used if you wish to take multiple curve
samples to evaluate and re-evaluate noise in a room/zone.
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Captured curves
Setting up captured curves
•
Evaluation Mode: evaluates the noise levels against specific criterion.
This is primarily used when you are capturing one to four different
curves. With this option, you assign a Capture name (Cap-1, Cap-2,
Cap-3, Cap-4) in the setup menu and then run a captured curve study.
To assign a new captured curve name, you return to the Options menu,
select a name and then return back to view session mode and run your
study.
NOTE: Whether you choose Survey or Evaluation mode, the captured
curved results will report the same data. The survey mode is
recommended for Captured Curves since it is slightly easier to use in the
field.
8. Depending on your selection in step 4, refer to the following:
•
If Survey Mode was selected, please see step 6.
•
If Evaluation mode was selected, press Up/Down
to highlight
Criterion. Repeatedly press Enter
to select Cap-1, Cap-2, Cap-3,
Cap-4.
9. Press On/Off/Esc
twice to return to the start screen.
Curves screen
Mode
Press Enter repeatedly to
toggle between Survey and
Evaluation modes.
Type
“Captured (CAP)”
automatically appears when
you select Survey as the type.
Figure 6-9: Captured Curves and Survey mode
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Captured curves
Running captured curves
Running captured curves
Capturing a curve allows you to take a snapshot of the current octave noise
profile. Once the captured curve is selected and applied, the SoundPro will
automatically calculate the captured curve results with the STI-PA
measurement.
1. From the Start screen, select either 1/1 octave or 1/3 octave for the
measurement type. (Repeatedly press first softkey.)
Selecting Measurement type
Press first softkey until 1/1 or
1/3 is selected
Figure 6-10: Selecting 1/1 or 1/3 for measurement type
2. To run a captured curve study, press Up/Down
highlight) View Session and press Enter
to select (or
.
3. In the View session screen, select the appropriate meter 1 settings by
using the corresponding softkeys for response time, weighting and
measurement type (lookup key).
4. Press Run
to start your study. Depending on if you chose survey
mode (see “a” below) or evaluation mode (see “b” below) in the setup
screen, do one of the following:
a. Survey mode: when you are ready to capture a curve, press Altf key
(on keypad) and the softkey menu will expand. Repeatedly press first
softkey to assign a capture curve name (You have four options: Cap-
1, Cap-2, Cap-3, or Cap-4). Then, to Capture, press the second
softkey.
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Criterion curve families
Types of Criterion Curves
CAP-1
Press first
Curve indicator
softkey to assign
a captured curve
name (i.e., CAP-
1, CAP-2, CAP-
3, or CAP-4)
Capture
Press Capture
softkey to
Capture a curve.
Figure 6-11: Capturing a curve (CAP-1)
b. Evaluation mode: to capture a curve, the curve indicators will appear
before and during your run. It will automatically save the run with
curve indicators and assign the name you applied during the Options
setup. To capture additional curves, assign a new name via the
Options menu and then run another test. (See “Setting up Captured
Curves” for details)
5. To view your results, repeatedly press Enter
(See section, “Running a
curve study and viewing results”, page 96.)
Criterion curve families
Criterion curves is another option to display and record a selection of spectral
curves for use in room and building acoustic measurements and noise
control engineering. The objective of a criterion curve is to specify the
ambient noise in a room or environment with a single number or statement,
rather than individually specifying multiple octave or third-octave band limits
(as you do with captured curves).
Types of Criterion Curves
The SoundPro Models SE/DL support a family of criterion curve families
which are explained below. (For more information, please see glossary.)
•
Noise Criterion Curves (NC) – uses a tangency method and is typically
used for HVAC room or building acoustic comparisons.
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Criterion curve families
Setting up criterion curves
•
•
Preferred Noise Criterion Curves (PNC) – uses a tangency method but
accounts for lower frequencies compared with the NC method.
Room Criterion Curves (RC) –calculates a numerical rating based on
speech interference and indicates any interference such as hissing,
rumbling, or vibration. (This method was introduced to determine noise in
offices/room acoustics.)
•
•
Balanced Noise Criterion Curves (NCB) –are one of the newer
methods that indicate interference from rumble, rattle, and hiss.
Noise Rating Curves (NR) – used primarily in Europe, Australia, and
other country’s room and building acoustic measurements, HVAC
studies, machine noise evaluations, and for some community noise
enforcement applications.
Setting up criterion curves
Setting up criterion curves is similar to setting up captured curve parameters.
However, with criterion curves, you select a specific curve type and then it is
applied during your study (or test).
Setting up criterion curves and appropriate measurement type
1. From the start screen, select either 1/1 octave or 1/3 octave for the
measurement type. (Repeatedly press first softkey.)
Selecting Measurement type
Press first softkey until 1/1 or
1/3 is selected
Figure 6-12: Selecting measurement type for curves
2. Next, select the measurement type, by selecting View Session (use Up/Down
Arrow to select) and press Enter
. Select the appropriate meter 1 settings
(using the softkeys) and set the response time, weighting, and measurement
type. (See Figure 3-4, page 27for an example).
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Criterion curve families
Setting up criterion curves
3. Press On/Off/Esc
to return to the start screen.
4. Select Setup (use up/down arrows to highlight) and press Enter
.
5. Select Options menu (use up/down arrows to highlight) and press Enter
6. Select Curves menu (use up/down arrows to highlight) and press Enter
.
.
Curves screen
Evaluation mode
Figure 6-13: Curves setup screen example
7. For the Mode, press Enter
repeatedly to select either Survey or
Evaluation setting. (Please see explanation below).
•
•
Survey Mode: dynamically evaluates the noise and reports the
appropriate noise curve. Typically used if you wish to take multiple curve
samples to evaluate and re-evaluate noise in a room/zone.
Evaluation Mode: evaluates the noise levels against specific criterion.
NOTE: Whether you choose Survey or Evaluation mode, the criterion
curved results will report the same data.
8. Select a type by pressing Up/Down
to move to the Type field.
9. Repeatedly press Enter to toggle between the five-criterion curve options.
NOTE: Depending on the Criterion curve you select, you may or may not
have the option to set the Criterion field. If the Criterion field appears once
you select the type, adjust this field by using the Up/Down arrows to move to
the field and press enter repeatedly to change the criterion.
10. Press On/Off/Esc
twice to return to the start screen.
•
To run your Curve study, please see section, “Running and viewing a
curve study.
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Audiometric background curves
Setting up audiometric background curves
Audiometric background curves
The SoundPro SE/DL series supports the following two types of audiometric
test room sound level curves:
•
Audiometric Test Room Background Sound Level Curves (OSHA)
which compares the ambient noise readings to the maximum
permissible ambient noise levels (MPANLs) at 500 Hz, 1K, 4K, 8K as
specified by the OSHA Hearing Conservation Amendment (1983).
•
Audiometric Test Room Background Sound Level Curves (ANSI)
which compares the ambient noise to selectable criterions specified
in ANSI S3.1-1999 and allows for a variety of audiometric earphones
using 1/1 and 1/3 octave band analysis.
Setting up audiometric background curves
For set-up parameters, it is recommended to set Meter 1 to Slow Response,
Z-Weighting, and measurement to Leq before you run your study.
Additionally, the measurement type should be set to 1/1 octave for OSHA
audiometric testing and should be set to 1/1 or 1/3 octave for ANSI
audiometric testing. The steps below detail the procedures.
Setting up audiometric background curves and measurement parameters
1. From the start screen, select either 1/1 octave or 1/3 octave for the
measurement type. (Repeatedly press first softkey.)
Selecting measurement type
Press first softkey until 1/1 or
1/3 is selected
Figure 6-14: 1/1 or 1/3 octave measurement type for audiometric testing
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Audiometric background curves
Setting up audiometric background curves
2. Next, select the measurement settings, by selecting View Session (use
Up/Down Arrow to select) and press Enter
.
3. Select the following recommended meter 1 settings using the softkeys
using the softkeys: measurement to Leq, Slow response, and Z-
weighting.
•
Setting measurement to Leq: Press the 1st softkey to access the
“Lookup” menu. Using up/down arrows on the keypad, select “L_eq”. A
diamond character u indicates the “selected” measurement.
•
•
Setting timed response: Repeatedly press 2nd softkey to select
appropriate setting (recommended is “S” for slow response.) An underline
denotes the “selected” response.
Setting Weighting: Repeatedly press 3rd softkey to select appropriate
setting (recommended is “Z” for Z-weighting).
Lookup menu
Timed Response
Weighting
Figure 6-15: Selecting measurement type for curves
4. Press On/Off/Esc
to return to the start screen.
5. Select Setup (use up/down arrows to highlight) and press Enter
.
6. Select Options menu (use up/down arrows to highlight) and press Enter
7. Select Curves menu (use up/down arrows to highlight) and press Enter
.
.
8. For the Mode field, select Eval (“Evaluation”) by repeatedly pressing
Enter
9. For the Type field, select one of the following by pressing the down arrow to
move to the type field and repeatedly press Enter
ANSI AM Booth or OSHA AM Booth
.
.
•
Curves screen
Mode – select Eval
Type – ANSI Booth
Criterion - field will only
appear if ANSI AM Booth
is selected in type field
Figure 6-16: Audiometric booth setup in the curves screen
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Running and viewing curves
Curve measurements and results
10. (Skip this step if you selected OSHA AM Booth). To select a Criterion,
press the down arrow and repeatedly press Enter . You have the
following three settings in the testing ranges of 125Hz-kHz, 250Hz –
8kHz, and 500Hz-8kHz octave or one-third octave bands.
•
•
•
NC refers to “not covered” ears in relation to a person in a hearing
booth without the use of hearing protection.
SA refers to “Supra-aural” which is used when a persons is in a
hearing booth with large headphones.
INS refers to “Insert” which is used when a person is in a hearing
booth with ear inserts.
11. Press On/Off/Esc
twice to return to the start screen.
•
To run your Curve study, please see section, “Running and viewing a
curve study”.
Running and viewing curves
After you have enabled curve mode, type, and criterion (only applicable for
evaluation mode), you are now ready to run a curve study.
When viewing your measurements it is important to understand how your
results will display. The following is an explanation of the curve types:
•
•
•
If NC, PNC, NR, NCB, or RC are selected these will display in 1/1
octave only.
If Captured Curves are selected, this will display in 1/1 octave or 1/3
octave.
If OSHA Audiometric is selected, it will display in 1/1 octave only. If
ANSI Audiometric is selected, it will display in 1/1 octave or 1/3
octave.
Curve measurements and results
Running a curve study and viewing results
1. From the Start screen, ensure you are in 1/1 or 1/3 mode. Then, press the
Up/Down arrows until “View Session” is highlighted.
2. Press the
Run key to begin your study. When completed, press pause
and stop keys to end the session.
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Running and viewing curves
Curve measurements and results
3. To view your results, press Enter
. The following screens appear.
(a) Sample bar chart – displays 1/1 octave band with curve and sound values
plotted on the spectrum. (See “a” below: A- selected band, B- curve
indicator, C- amplitude in band).
(b) Tabular screen – shows 1/1 octave band values in a table format. (see “b”
below).
(c) Community noise – displays community noise (Please see “Community
Noise screen”, on page 69 for a screen example.)
A
B
C
(a) Sample bar chart with curves
(b) Tabulation screen
(d) Dosimetry screen - shows dosimetry measurements (see “e” below).
(e) Delta screen – displays difference between the selected curve and current
measurement, in each filter band. A positive value is the amount exceeding the
curve (see “e Delta screen” and reference “A” in the figure) and a negative value
is the amount below the curve. NOTE: for a captured curve, it will display CAP-
1(or applied captured 1-4) in the top left instead of a criterion curve (NC-30).
You may have to select LEQ to view the results via the Look-up key.
A
(d) Dosimetry screen
Figure 6-17: Curve results
(e) Delta screen
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Speech Intelligibility
STI-PA testing
Speech Intelligibility
Another available add-on feature is Speech Transmission Index (STI) used to
evaluate and classify speech intelligibility dependent of background noise level. STI
is the standardized measurement in the IEC 60268-16:1998 standard.
STI-PA testing
STI refers to the amount of modulation preserved in the broadcasting of an artificial
speech signal through an alarm system. The intelligibility measurement is a single
value between zero and one, which factors in corruption of speech, with modulating
speech frequencies over octave bands between 125Hz to 8kHz.
STI-PA is measured using seven octave bands and 2 modulation indices per octave
band simultaneously allowing a 15 second measurement. In essence, any noise
which masks (or corrupts) the talker-to-listener path is evaluated and a recommended
measurement is computed at the end of an intelligibility test. The following sections
briefly address points to consider when setting up a STI-PA test.
Zones
Where do I measure speech intelligibility?” A building or stadium can be
broken into “zones”. Each “zone” has a room with one alarm system. In
some situations, one room may have more than one alarm system or may
have a change in ceiling height (such as an atrium or a balcony seating
versus lower level seating). In those instances, each section would be
considered a zone and each zone would be tested.
After determining the “zones” in your building, it is recommended to design a
map of the key zones/rooms. Generally, a zone is a 20X20 area. If the room
is larger than 20X20, it is recommended to take another measurement in this
section.
Selecting STI scale or CIS scale
With the SoundPro, you have two measurement options which will determine the
intelligibility of your building which are the STI scale and the CIS scale (explained
below.)
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Speech Intelligibility
Selecting STI scale or CIS scale
STI scale
The scale identifies if the mass notification system is intelligible or unintelligible based
on a STI scale ranging from 0.0 to 1.0 where 0.5 to 1.0 is considered a passing
score, per NFPA 72 and IEC 60849.
STI
00 - 0.30
0.3 - 0.45 0.45 - 0.60 0.60 - 0.75 0.75 - 1.00
scale Unacceptable
Poor
Fair
Good
Excellent
Common Intelligibility Scale (CIS)
Similar to the STI scale, the CIS scale uses a range from 0.0 to 1.0 to determine if the
MNS is intelligible. However, with the CIS scale, a rating of 0.7 to 1.0 is an
“intelligible” score, per the IEC 608489 and NFPA 72.
CIS
00-0.48
Bad
0.48 - 0.65
Poor
0.65 - 0.78 0.78 - 0.88
Fair Good
0.88 - 1.0
Excellent
scale
When to take STI-PA readings?
Scenario one
You may be able to run the test signal through the PA system during normal
business hours. In this scenario, you would set the meter to STI-PA and select either
STI scale or CIS scale and run your study in the mapped “zone” areas.
Scenario two
In other situations, running a test tone through a PA system during business hours
could be distracting and not feasible for your environment. In this situation, it is
recommended to follow these procedures:
•
First, take sample background noise measurements during business hours.
These are saved and stored on the Verifier as “Captured Curves”. The verifier
will save up to four “captured curves”
•
•
Second, in the STI-PA options, select the appropriate captured curve.
Third, run your measurements at the appropriate time of day (i.e., late
evening/early morning). (The applied captured curve will automatically factor
into your study.)
•
Fourth, view your results on the display of the instrument (or in Excel by using
the File converter tool.)
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Speech Intelligibility
Conducting a STI-PA test (overview of steps)
Conducting a STI-PA test (overview of steps)
1. Calibrate the SoundPro.
2. Set-up your STI-PA options via the” Measures” setup screen. (Select the measurement type
as STI-PA.)
3. A level setup is conducted. From a fixed-point, the technician measures the A-weighted SPL
of MNS message (or alarm system). The test signal volume should approximately match the
MNS message volume. (You would adjust the test signal to match the LAS value.)
4. The test signal is played through buildings voice system (PA system).
5. The technician/sound tester positions himself/herself in “zones”/building areas.
•
It is recommended to design a map of “zones”(or rooms) to indicate where you will be
taking your measurements.
•
Set measuring range appropriately.
6. STI-PA measurement is conducted. Press the Run/Pause key to start the study.
NOTE: If you want to post-process your intelligibility measurements with previously captured
background noise, you would first capture curves and then apply this during your study.
7. After a 15-second countdown, either a STI or CIS level is displayed with a pass/fail message.
8. The technician/sound tester moves throughout the building and measures in all zones/rooms.
NOTE: A zone/room is typically a room 20x20. More than one measurement may be
required if the room exceeds this size.
9. The tests are noted as pass/fail.
NOTE: the past tests can be reviewed and loaded via the File System screen.
STI-PA setup
The following table explains all of the parameters found in the measures setup
screen.
Measures
Explanation
setup screen
Scale type field Select either STI scale or CIS scale. (Please refer to Chapter 1, “STI
scale or CIS scale”)
Gender field
The voice can be set according to the test signal being use, male or
female voice. NOTE: the Verifier default setting is Male. If using the
test signal supplied by 3M, this uses a male test signal; so; you will
not have to change this field if you only use the male test tone signal.
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Speech Intelligibility
STI-PA setup
An optional “captured curve” feature can be applied to your STI-PA
testing. Essentially, you take a snap shot of the current sound level
measurement and store it as your background noise. Once the
background noise data is gathered, you can apply the captured
noise during your STI-PA measurement. This may be used in a
situation where you cannot play the test signal during “normal”
working hours. (Please refer to Chapter 1, “When to take STI-PA
measurements, scenario 2” for more details.)
Post Process
field
You can change the range when measuring. The following ranges
are selectable parameters: 90 dB – 140 dB, 80 dB – 130 dB, 70 dB
-120 dB ,60 dB – 110 dB, 50 dB – 100 dB, 40 dB – 90 dB, 30 dB- 80
dB, and 20 dB – 70 dB.
Range field
Table 6-3: Measures setup screen parameters explained
Setting up STI-PA (speech intelligibility)
1. Turn the meter On.
2. From the Start screen, select the Measurement type as STI-PA.
•
Press the first softkey repeatedly until “STI-PA” appears.
Selecting measurement type
STIPA
Figure 6-18: Measurement type selection (STIPA)
3. Using Up/Down arrows, highlight Setup menu and press Enter
4. Using Up/Down arrows, highlight Options and press Enter
.
.
5. Press Up/Down arrows, to select Speech Intelligibility & press Enter
.
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Speech Intelligibility
STI-PA setup
6. To change the Scale field, press Up/Down arrows until Scale is highlighted
and press Enter to change to either STI or CIS.
Speech Intelligibility screen
• Setup screen
Captured Curve selection
• If you captured background
noise and want to apply it,
select Cap1, Cap2, Cap3, or
Cap4 to apply during STI-PA
test
Figure 6-19: STI-PA setup screen
7. To change the Gender field, press Up/Down arrows until Gender is
highlighted and repeatedly press Enter to select Male or Female.
8. To change the Post Processing field, press up/down arrows to select
the field and repeatedly press Enter
Off.
to select a Captured Curve or
9. To change the Range, press Down arrow and then repeatedly press
Enter to select a specific range.
10. Once set, press Enter
to return to the Start screen.
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Speech Intelligibility
Conducting a level setup (for STI-PA)
Conducting a level setup (for STI-PA)
•
From a fixed-point, measure the A-weighted Sound Pressure Level of your
mass notification system (or alarm system). When in the STI-PA screen,
adjust the range as needed via the Up/Down Arrows.
•
The average dB level is displayed when in stop mode.
NOTE: the instrument will display the LAS when in stop mode. This is
also called “survey mode”.
Stop mode
Average dB level
Displayed while in run
or pause mode
Range
Press up/down
arrows to adjust
the range values
Average
decibel
Figure 6-20: Level set-up and average decibel level
Running a speech intelligibility study
Before proceeding with a STI-PA measurement, ensure you calibrated the
Verifier and conducted a Sound Level setup.
NOTE: if there is impulsive noise present, it is best to capture the background
noise (via the Captured Curve pop-menu), remove the noise, or come back later
when the noise is not present. That is because impulsive noise and strong
voices can skew the measurement results. If you captured the background
noise, you would then come back when the noise is not present and apply the
captured curve during a STI-PA measurement. (See “Applying captured curves
for STI-PA testing for more details, on page 106.)
The following instructions explain how to run, pause, and stop a STI-PA study
without captured curves. (If you wish to take a background noise sample, also
called “captured curves see “Applying captured curves for STI-PA testing” for
more details, 106.)
NOTE: it is optional to organize your measurements into Sessions & Studies.
How to run a STI-PA study?
1. The SoundPro should be powered on and you should be viewing the STI-
PA measurement screen.
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Speech Intelligibility
STI-PA results screens
2. Play the signal over the loudspeaker and then locate yourself in the
appropriate zone/room.
3. Verify that the range setting is appropriate for the level being measured. It
is desirable to select the longest range that does not overload. (To change
the range, press Up/Down Arrows from the STI-PA screen.)
4. Press the Run
key to begin your study.
5. The meter will run for 15 seconds and then pause.
• To continue to take measurements, repeat step 3.
• To terminate your study, please see step 6.
6. Press the Stop
key to end your study. (Three viewable results screens
are explained in the next section.)
STI-PA results screens
The test signal is made up of 7 octave band signals which encompasses a
combination of vowels and syllables from common speech. There are 14
modulating frequencies that emulate a male/female’s speech patterns. The STI
method is based on the determination of the modulation transfer function (MTF)
which is the ratio of measured modulation to the overall signal strength at each
modulation frequency.
Viewing STI-PA results
1. Once in pause or review mode, press
the STI-PA results screen.
repeatedly to toggle through
STI-PA measurement and scale results screen
In the STI-PA measurement screen, the MTF is combined according to IEC 60268-
16 and presented on a scale between 0 to 1 representing the quality or intelligibility of
the mass notification system.
Range
STI-PA scale results
STI-PA results
graphical view
Figure 6-21: STI-PA measurement (scale results) screen
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Speech Intelligibility
STI-PA results screens
STI-PA modulation screen
In the Modulation measurement screen, the average decibel level over the run-
time in seven octave bands ranging from 125HZ to 8KHz with 14 frequencies is
displayed in a tabular format. These values are the signal to noise ratio
(accounts for any interfering background noise such as non-linear distortions,
electronics, reverberation, HVAC systems) in each attenuation band and
indicates which values are intelligible/unintelligible based on the CIS/STI scale.
NOTE: A high MTF value indicates that the listeners received the
message without any distortions or interference.
LEQ
Average dB
level in band
Signal to noise ratio for each band
* Based on the CIS/STI scale ranging
from 0.00 – 1.00
Figure 6-22: STI-PA Modulation screen
Table 6-4 defines the STI-PA: modulation frequencies for the seven octave
bands (per the IEC 60268-16 standard).
Octave band Hz
125-250 500
1 k
2 k
4 k
8 k
First modulation
1.00
5.00
.63
2.00
1.25
6.25
0.80
4.00
2.50
12.5
frequency
Hz
Second modulation
frequency Hz
3.15 10.0
Table 6-5 defines the STI octave band with specific male and female weighting
Idard).
Octave band Hz
125-250
0.127
0.078
0.117
0.099
500
1 k
2 k
4 k
8 k
Males
0.23 0.23 0.30
0
0.06 0.01 0.04
5
0.22 0.21 0.32
3
0.06 0.06 0.02
0.224
0.095
0.250
0.076
0.17
3
-
3
9
1
7
Females
0.19
4
-
6
8
6
2
5
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Speech Intelligibility
STI-PA results screens
STI-PA modulation envelope screen
This screen reports a summary of the STI-PA modulation screen.
1. To view each band’s results, press
Arrow key.
NOTE: The results can be used to assess each frequency’s band modulation
level to determine why it passed or failed (in order to correct any issues).
Scale Results of
selected band
Scale
Selected band
MTF scale rating results
across bands
Figure 6-23: STI-PA Modulation envelope screen
Storing background noise/capture curve
In order to measure and store background noise prior to STI-PA testing, you will want
to measure (or “capture”) the level via the Captured Curve Setup and then apply it
during the STI-PA test. (Note: this is only performed if you do not want to play the
test tone during “normal” business hours.)
1. From the Start screen, select either 1/1 octave or 1/3 octave for the
measurement type.
Selecting Measurement type
Press first softkey until 1/1 or 1/3
is selected
Figure 6-24: Selecting 1/1 or 1/3 for measurement type
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Speech Intelligibility
STI-PA results screens
2. Setting up Curves: Select Setup and press Enter
.
•
•
•
Select Options (via the Down Arrow and press Enter
Curves will be highlighted, press Enter
Choose Survey as the Mode and Captured (CAP) as the Type and then
press On/Off/Esc repeatedly to return to the Start screen.
).
.
Mode
When highlighted, press Enter
continuously to toggle through the
menu options and select Survey.
NOTE: Survey/Eval. mode will
compute the same results.
Captured (CAP)
To select the Type field press down arrow.
Press Enter
repeatedly to select
Captured (CAP).
Figure 6-25: Captured curve/background noise setup for STI-PA testing
3. Capturing curve/background noise: (See Figure 6-26 below.)
•
•
Select View Session by pressing Up/Down
and press Enter
.
Note: it is recommended to capture either the SPL or the Leq level. To
change the measurement displayed, press the Lookup softkey and select
either L_ or L_eq. (For more information, please see “Changing displayed
measurements”.)
Selection Panel
This appears when lookup softkey is
pressed.
•
The diamond symbol uindicates
which measurement is selected.
(L_ denotes SPL). Press Enter key
to confirm new selection.
•
•
In the broadband/RTA screen, press Altf key. (This will expand the softkeys
and Cap will appear.)
When the level is stabilized, press the “Capture” key. (See Figure 6-26.)
4. Optional: To capture additional background levels, change the 1st softkey to
either (Cap-1, Cap-2, Cap-3, Cap-4) and then press the Capture (2nd) softkey.
Repeat this step as needed. (You can store and apply up to 4 background noise
SPL levels.)
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Speech Intelligibility
STI-PA results screens
CAP-1
Press first
Curve indicator
softkey to assign
a captured curve
name (i.e., CAP-
1, CAP-2, CAP-
3, or CAP-4)
Capture
Press Capture
softkey to save
the background
noise/SPL.
Figure 6-26: Captured curves/background noise
5. Once all background noise has been captured, refer to, “Applying captured curves”
below.
Applying captured curves for STI-PA testing
To apply the curves during a STI-PA measurement remember to complete one
and two below before applying the curve.
Applying captured curves
1. From the Start screen, select View Session and press . Press Altf key.
2. Select one of the captured curves by pressing the 1st softkey (i.e, Cap-1).
Press On/Off/Esc key.
3. From the Start screen, press the 1st softkey continuously until STI-PA is
selected. Then, select View Session and the STI-PA screen will open.
POST CAP-1
The selected Captured Curve,
i.e., CAP-1, will appear on the
STI-PA screen. To change the
Cap-x, repeat steps 1-2 above.
Figure 6-27: Post CAP-1 applied during STI-PA test
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Speech Intelligibility
STI-PA results screens
4. Press the Run/Stop key while playing the test signal in the appropriate
location/zone. The captured curve will automatically calculate with the STI-
PA results.
NOTE: press the left/right arrow to view the modulation screen and/or the
modulation envelope screen if desired.
STI-PA test results screen
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STI-PA results screens
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111
Files
STI-PA results screens
7
Viewing Past Measurements
This chapter explains how to view your past sessions and studies. It will also
explain how to rename your sessions/studies and how to clear/reset the data
on the memory card.
Files
A session file is automatically created when you begin the first study in that
session. It contains the following types of information, as applicable:
•
Measurements - Measurements for each study in the session and
overall measurements for the session.
•
Run times - Run time for each study in the session and overall for the
session. If back-erasing was used for a study (“Back-erasing”), the run
time for that study will be reduced by the duration of the back-erased
segment.
•
•
•
•
•
Analysis type - The analysis type selection, if available in your
instrument, that applied when the measurements were made.
Calibrations - If performed, Pre-Calibration results for the session and
Post-Calibration results for studies in the session.
Logged data - Stored with the session if the instrument contains the
logging option and logging was enabled for at least one measurement.
Parameters - All user-adjustable settings in setup screens that are
involved in the data processing that leads to the measurements.
Instrument settings - All user-adjustable settings in setup screens that
affect the operation of the instrument, but not including those in the Time-
Date, Sig. Input and Battery Check screens.
File directories
Files on the memory card are stored in directories. Session files are
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File directories
File directory screen explained
automatically stored in the Session Directory, and Configuration Files are
automatically stored in the Configuration Directory. The File directories
screen can be used to:
•
•
•
View past sessions/studies via the Session Directory menu
View Configuration directory
Re-name last session file is an optional feature that is used as an
organizational tool.
•
Save Configuration file is used to save a customized setup on the
instrument if not using QSP-II.
CAUTION: The memory card should not be inserted or removed when
working in the instrument’s file system – you can lose data.
File directory screen explained
NOTE: this is accessible when a session is not opened (i.e., run /pause
mode).
1. From the Start screen, press the File softkey. The File screen appears.
2. In the File screen, select Session Directory or Configuration Directory, then
press
. The directory that you requested appears.
Session Directory
*Used to load/view previous
data, delete, or rename
Figure 7-1: File Screen
Viewing past sessions/studies (review mode)
Once you run, pause, and stop your measurements, the data is automatically
stored in the instrument’s memory card, which is referred to as past studies
or past sessions. You can view past measurements by first loading the study
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File directories
Viewing past sessions/studies (review mode)
or session via the Data File screen. The results will be played back (also
called review mode) in accordance with the analysis type that was selected
when the measurements were stored.
1. From the Start screen, press the File softkey.
Softkeys
File
Figure 7-2: Start menu screen
2. Session Directory will be highlighted, press Enter
.
Session Directory
Figure 7-3: File menu screen
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File directories
Viewing past sessions/studies (review mode)
3. In the Data File screen, press
sessions and press Enter
Arrows to select one of the saved
(to load the file).
Data file
Press “Load” softkey
Figure 7-4: Data File screen
4. It will state “Loaded”. Press either Enter
or On/Off/Esc key.
5. In the Start screen, the review indicator appears. Select either View
Session or View Current Study (by pressing and ).
Run time
Review mode - when both Pause and
Stop indicators appear, this signifies you
can view your saved session or study.
View current study is
selected. Press enter to
view data.
Figure 7-5: Selecting past study data (review mode)
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File directories
Loading and deleting files
6. A bar chart or a filtered bar chart may appear (depending on your
measurement setting). Press Enter
to view various measurement
screens.
Review mode indicator
Bar chart (SLM mode) results
File path – indicates the name of
session/study, the analysis type
(SLM, 1/1, 1/3)
Figure 7-6: Viewing past data example
7. Press Stop key to exit Review Mode. (The Pause icon will disappear leaving
only the Stop indicator displayed on your screen.)
Loading and deleting files
As you are working with loading past files and possibly deleting files which have
been imported into QSP-II, it is important to note that the delete operations take
place as soon as you press the respective softkey. While you can re-load a file,
you cannot un-delete a file, so be careful. (Loading and deleting files is
accessed via the File softkey\Session Directory menu.)
Loading or deleting a file
1. From the start screen, press the File softkey.
2. In the File menu, ensure Session Directory is highlighted (if it is not,
press
until it is selected.) Press
key.
3. To load a file, press
to select the appropriate file and press Load
softkey (see “b”) or press
key (skip this step if you are deleting a file).
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File directories
Session directory
4. To delete a file (if not applicable see step five), press
appropriate file and press Delete softkey (see “a”). (The display will state
the file was deleted.) Press key to return to the Data File screen. To
to select
delete more files, repeat this step. Press
start screen.+
repeatedly to return to the
Data File screen
• Retrieve your past session/studies
by selecting a file.
a
c
b
Softkeys
Delete (a), Load (b), More (c)
Softkey menus
Figure 7-7: Loading and deleting files
NOTE: You may have dozens of files saved. Press the More softkey to
expand the file list for the appropriate selection.
5. If you loaded a file, please see next section, “Viewing past
sessions/studies”.
Session directory
The Session Directory contains the past saved sessions and studies. To
navigate to this screen, select Setup\File softkey\Session Directory menu.
(Refer to Figure 7-2 and Figure 7-3 for screen examples.)
Figure 7-8: Examples of directory screens
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File directories
Session directory
Navigating in a session/config. directory
Press any arrow key to move around in the directory. If there are multiple files,
press the More softkey to navigate to additional screens. Press On/Off/Esc
key to return to previous screen(s).
Naming and renaming files
There are common procedures that you can use to name and rename files,
including a lookup capability that allows you to determine if a filename is already
in use.
You cannot rename a session file unless it is in the instrument’s memory.
Accordingly, you can rename the closed session currently residing in memory,
but you must first load a past session file before you can rename it.
NOTE: For past sessions, please follow these steps but first load the file.
Renaming the session in memory
1. In the Start screen, press the File softkey. The File screen appears.
2. Press
The session file renaming screen appears.
3. In the File Name screen, press and the following changes will occur:
to select Re-name Last Session File, then press
.
•
The highlighted cursor moves to the field of one of the four softkeys,
depending upon the last character in the existing filename.
•
The last character in the filename is underlined.
• Press Enter to add
another field.
• Softkeys may be used
to quickly select a
letter/number
• Press Up/Down arrows
to change character
character.
•
Or repeatedly press
Up/Down Arrows to
select appropriate
character.
Figure 7-9: Naming a file in the Data File screen
4. Take the following actions to change the underlined character:
• Press to move sequentially until the appropriate character is selected.
The underlined character in the name changes as you press the keys.
• (Optional Shortcut): Press a softkey to select a different character set.
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Configuration directory
Saving (& naming) setup file (config. file)
•
•
•
Add a character by pressing the right arrow key.
Delete a character by pressing the left arrow key.
Repeat this step as necessary.
5. When finished, press
and Save will appear.
6. Press to save the file name (or press On/Off/Esc to cancel).
Configuration directory
File Setups, or File Configurations, can be saved to the instrument in order to
save and reuse for future. (This can also be performed via QSP-II when you
save a setup.)
The naming/renaming procedure below includes a lookup utility that you
can use to determine what name to assign.
Saving (& naming) setup file (config. file)
When saving a setup, you first select the settings and then save via the Save
Config File (accessed from the File softkey in the start menu.) Once a
configuration is saved, you can view or delete it via the Config. Directory.
Naming and Saving set-up
1. Ensure the SoundPro is in Stop mode and the parameters are selected.
(See Chapter 3 and Chapter 4 for details.)
2. In the Start screen, press the File softkey and select Save Config. File.
3. In the Setup File screen, press
to move to the name/rename file field.
Selected character (indicated by the
underline). Press up/down to change
character. Press Left arrow to move to
add another character. Press Right to
delete or change a character.
Save
Press on/off/esc to
move to this field
Name/Rename file
Press a softkey to quickly select
a character set. Then, press
up/down arrows.
Figure 7-10: Saving/Creating setup file (config. file)
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Configuration directory
Viewing, loading, deleting setup files (config.)
4. To change the file name follow below:
•
Press
underline).
to change the selected character (denoted by the
•
Optional Shortcut: press a softkey (has a character range) and then
press to quickly move to the appropriate value.
•
•
•
Press Left arrow to delete a character (or move backwards).
Press Right arrow to add a character.
Repeat as necessary.
5. To save your setup, press the On/Off/Esc and the Save option will be
highlighted. Press Enter key to save (or press On/Off/Esc key to cancel).
Viewing, loading, deleting setup files (config.)
Viewing, loading, deleting setup files
1. Open the Configuration Directory screen (follow steps 1-2 above ,
“Saving setup file”).
2. The Setup File screen will appear. Depending on what setups you
saved, these will appear in this screen.
3. To Load or Delete a file configuration, do the following:
•
•
•
Select a file you wish to load/delete (by pressing up/down arrow until
selected.)
Once selected, press either the Load softkey (to load and apply the
saved setup) or press Delete (to delete a setup).
Press On/Off/Esc to repeatedly to return to the Start screen.
Load softkey
Once selected, it will
apply the saved
setup.
Delete softkey
Select a set-up
then press
Delete softkey
Figure 7-11: Viewing, loading, deleting setup files
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Memory card
Compatibility
Memory card
The memory card supplied with the instrument is used to store session and
configuration files. If you run studies and sessions without a memory card, it will
not store session files. In that case, running a session will automatically
overwrite the information in the instrument’s memory from the previous session.
Essentially, lack of a memory card converts a multi-session instrument into a
single session instrument.
Compatibility
Steps have been taken to make sure the SoundPro is compatible with as many
SD cards as possible. Because of the many SD card manufacturers and the
varying low-level formats they use, 3M can only guarantee operation with cards
available from 3M. If using a memory card with 2GB or less, FAT 16 format is
required. For cards ranging from 2GB to 32GB, a FAT 32 format is required.
Determining the format of an SD card
1. Insert the card in the computer’s card reader drive.
2. Open Windows Explorer.
3. Right-click on the CD drive listed under My Computer.
4. From the right-click menu, select Properties.
5. On the General Tab, the File System field identifies the card’s format.
Formatting a card with the SoundPro
The SoundPro has the capability of doing a Quick Format or Full Format.
A Quick Format is all that is required in most cases to format a card in FAT
16 or FAT 32. A Full Format will verify each sector of the card as it formats
with the penalty of taking much longer.
CAUTION: A Quick Format may be used to delete all files from the card.
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121
Communicating with a PC
Using Detection Management Software DMS
8
Communicating
This chapter covers issues related to the memory card, the USB port and the
AC/DC outputs.
Communicating with a PC
Using Detection Management Software DMS
When you download the data via the the download feature, the data is stored and viewable via the
data finder page with advanced charting, tables, and reporting capability. The information is viewed in
customizable graphs and/or charts in the panel layout page.
Using an external card reader
DMS can import data/configurations with an external SD card reader. You
should never remove a card from a reader without first ejecting it from the
drive. Eject using the following Windows procedure.
Eject procedure
1. In the computer, right-click the Removable Disk entry under My
Computer. A menu appears.
2. Click Eject in the right-click menu.
Working with measurement data in DMS
The downloading of data enables you to analyze your data in customizable charts and graphs with
reporting capability. with optional reporting capability.
Note: please reference the online DMS User Manual under Help menu, DMS user manual for
more information.
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AC/DC output
Using Detection Management Software DMS
DMS and working with SoundPro data
Viewing data and Data Finder Page
2. DMS Welcome page and instrument communication
A. Click on icon (see A) to access the
1. Communicating/connecting the Edge to the pc
A. Turn On he Sound Pro.
Instrument download panel.
B. Plug in USB cable from SoundPro to pc.
A
3. SoundPro and downloading
A. Select the SLM family and the SoundPro mode from the
Instrument window (see A). Click on “Go to session finder after
download” box.
4. Selecting and viewing data
A. The Data Finder page (see A) is used to view, select, and
preview reports. Note: Click Browse to view all data files.
B. Select the data by clicking on either the session/study (Note:
you may need to expand to see the study data.
B. Click the
button (See B).
C. Once downloaded, click the Data Finder tab (if you did not select
“go to session finder in step A”.) (See C).
C. To view in Graphs and Tables, click on
buttons.
or
A
Data Finder page
A
B
5. Viewing Data in graphs & tables & Report View
The graphs and tables page is noted as the panel layout view page.
A. The session/study data page displays the data in logged data
charts/tables (see A).
B. Click on
(see B).
to view the panels in a report format
A
B
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AC/DC output
AC output
AC/DC output
Output signals are available at the AC/DC jack in the hardware interface panel at
the base of the instrument (“Hardware interfaces” on page 6). Users are
responsible for providing the cable to attach to this jack. For information about
the pinout, see “AC/DC jack” on page 134.
AC output
The AC output is the amplified SPL of Meter 1. It is weighted depending on
the "A, C, Z or F" selection for Meter 1. The maximum full-scale output
voltage occurs near the upper dB level of the selected range and is
approximately 3.16 volts "before clipping." The full usable range of this
output is 60 dB. The relationship is shown in Table 8-1.
Relative dB
Full scale
-10 dB
Output (Vrms)
3.16
1.00
-20 dB
0.316
-30 dB
0.100
-40 dB
0.0316
0.0100
0.00316
-50 dB
-60 dB
Table 8-1: AC output
NOTE: The AC output signal is not intended to be used for testing
instrument performance.
DC output
The DC output has a voltage range between 0 and 4.0 VDC that is
produced by Meter 1 and includes the time response and frequency
weighting settings for that meter. It represents and tracks the
displayed dB level in one second increments. The DC output is
linearly scaled over the range of –20 to 180 decibels. The highest
level that can be represented on any selected range is always the
ceiling of that range and depends upon the selected microphone
model.
The DC output voltage level is related to the measured decibel value
without regard to the range setting. You can calculate the SPL in
decibels from the DC output voltage, VDC, by this equation:
SPL = 50 (VDC – 0.4) dB
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AC/DC output
DC output
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Appendix A
APPENDIX
A
Specifications
Conformance to standards
Acoustics
IEC 61672-1 (2003) (2002-05) - Electroacoustics, Sound level meters, Part 1:
Specifications.
IEC 61672-2 (2003-04) - Electroacoustics, Sound level meters, Part 2: Pat-
tern evaluation tests.
IEC 61260 (1995-08) - Electroacoustics, Octave-band and fractional-octave-
band filters.
ANSI S1.11-2004 - American National Standard “Specification for Octave-
Band and Fractional-Octave-Band Analog and Digital Filters.”
ANSI S1.4-1983 (R2001) - American National Standard “Specification for
Sound Level Meters.”
ANSI S1.43-1997 (R2002) - American National Standard “Specifications for
Integrating Averaging Sound Level Meters.”
Earlier standards - IEC 60651 and IEC 60804.
EMC emissions and immunity
Pending testing on production products.
References
◦
Air temperature: 23 C
Static pressure: 101,325 kPa
Relative humidity: 50%
Level: 114 dB
Frequency: 1 kHz
Microphone Capacitance: 18 pf
Microphone Sensitivity: -28 dB
Range: 140 dB
◦
Angle: 0
Mechanical characteristics
Housing - Stainless fiber-filled ABS/polycarbonate with internal EMC
shielding.
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Appendix A
Size - 7.9 cm(W) X 28.2 cm (H) X 4.1 cm (thick); (with preamp and microphone)
3.1"(W) X 11.1"(H) X 1.6" (thick) (with preamp and microphone)
The width is measured across the face of the instrument. The length,
which includes the preamplifier but not the microphone, is measured
along the longest axis of the instrument.
•
Weight - 0.54 kg (1.2 lbs), including batteries.
Tripod mount - Threaded insert on the back of the instrument. Accepts a
1/4"-20 screw.
Electrical characteristics
While the instrument is operating from battery or external power it conforms
to all applicable tolerance limits of the stated standards. While operating on
battery power alone the instrument will automatically shut down when the
battery power is depleted. The total battery voltage range is between the
maximum overcharge voltage of the NiMH cells 6.6 volts and the low voltage
automatic shut down voltage of 4.4 volts.
Power sources
Internal power
Approximately 8 hours of continuous operation at normal mode of operation
under reference environmental conditions when full capacity batteries are
installed.
Main batteries - Four, replaceable alkaline AA batteries included as original
equipment. Rechargeable NiMH batteries available as an option.
•
Battery life (Constant run without backlighting) - Varies greatly
depending on whether alkaline or NiMH batteries are in use and the
logging configuration. You can expect the longest battery life when
using rechargeable 2700 mAH (or greater) cells. Battery life is slightly
shorter in units that contain either filter option.
•
Battery life (Constant run with backlighting) - Will reduce battery
life by approximately 10%.
Auxiliary battery - Internal battery protects against loss of settings when
the main batteries are being replaced.
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Appendix A
External power
External DC power may be provided to the Power jack from the AC or DC
sources identified below. Power consumption will range from 1.0-1.5 W at
8-16 VDC.
•
•
•
8 VDC - 125 to 190 mA.
12 VDC - 85 to 125 mA.
16 VDC - 60 to 90 mA.
AC power source ~ Optional switching-type power supply, 3M part num-
ber 053-571.
•
•
•
•
Supply input - 100-240V, 47-63 Hz.
Supply output - 9VDC, 1.1A max.
DC connector - Cable has 2.1mm plug (center pin positive)
AC adapters - Included are different snap-on adapters that allow it to
plug into various outlets.
DC power source - 3M offers a cable as an option that plugs into an auto-
mobile auxiliary jack, 3M part number 053-870. 9.0 Volts is the nominal
power supply voltage to be applied to the DC power jack.
Preamplifier (removable)
Microphone - Accepts 13.2 mm (0.52") microphone directly. Other sizes
require an adapter.
Input impedance - Greater than 1 GΩ; less than 2 pF.
Signal limit - 11 VAC maximum.
Cable attachment - Capable of driving up to a 15M cable with negligible
signal loss.
Meters
Dual meters - Contains two separate meter circuits, each of which can be
individually configured with variable parameters.
Input impedance - 20 kΩ in series with 11 µF capacitance, with 100 pF
capacitance to ground.
Bandwidth
The following bandwidth is typical for the instrument and preamp when set to
the 40-140 dB range and F-weighting. Electrical signals are input to the sys-
tem with the 059-703 input adapter installed on the preamp.
•
•
•
0.1 dB down - 20 Hz to 14 kHz.
1.0 dB down - 5 Hz to 25.2 kHz.
3.0 dB down - 3 Hz to 25.8 kHz.
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Appendix A
Octave filters (optional)
Number of bands ~ Eleven bands, with center frequencies (fc) ranging from
16 Hz to 16 kHz. The octave filters are flat within < 0.3 dB in each passband.
The half-power points are at 0.707 fc and 1.414 fc.
Octave skirts ~ With respect to fc:
•
•
•
•
fc/2 frequencies - Approximately 20 dB down.
2fc frequencies - Approximately 30 dB down.
fc/10 frequencies - Approximately 70 dB down.
10fc frequencies - Approximately 95 dB down.
Third-octave filters (optional)
Number of bands - Thirty-three bands, with center frequencies from 12.5 Hz
to 20 kHz. The 1/3 octave filters are flat within <0.3 dB in each passband.
The half-power points are at 0.89 fc and 1.12 fc.
Third-octave skirts ~ With respect to fc, the fc/2 and 2fc frequencies are both
approximately 50 dB down.
Instrument noise
Noise floor depends upon which microphone is being used. The following
measurements are for a typical instrument, with the 059-703 adapter (18 pF)
connected to the preamp and shorted at the BNC end. This condition closely
simulates the noise floor of a ½-inch microphone. For these measurements,
the instrument was set to the lowest range and to a slow response time.
•
•
•
•
22 dBA.
30 dBC.
35 dBZ.
40 dBF.
Environmental effects
The typical time interval needed to stabilize after changes in environmental
conditions is 5 minutes for each 10 C change.
Temperature
Operating - Less than ±0.5dB effect over -10 oC to 50 oC (14 oF to 122 oF).
Storage - 25 oC to 70 oC (-13 oF to 158 oF).
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Appendix A
Humidity
10% to 90% RH (non condensing).
User interface
Display
Size - 128 x 64 pixel display that measures 6 cm x 4.8 cm (2.4" x 1.9").
Lighting ~ Transflective to take advantage of ambient lighting plus fiberoptic
backlighting that can be manually operated or set to turn off after a timed
interval.
Keypad
Construction - Molded layer that holds fourteen press-sensitive buttons.
Buttons - Five buttons have dedicated control functions, another five are pri-
marily used for selection and navigation, and another four provide variable
functions when they are defined in the display (softkeys).
Languages
English, Spanish, German, French, Italian and Portuguese.
Input/output
Memory card ~ Removable Secure Digital (SD) data storage device that is
inserted in a slot at the base of the instrument. Stores measurements made
in studies and sessions in session files. If the instrument has a logging option
installed and is logging measurements, the logged values are stored in the
applicable session file as well. The card also stores configuration files.
Microphones
The following specifications apply to microphones connected to the instru-
ment.
QE7052 - Free-field, Class/Type 2, (standard), low cost ½-inch diameter
(.52"), electret (200 volts must be set to “Off”)
BK4936 - Free-field, Class/Type 1, (standard) ½-inch diameter (.52"), elec-
tret (200 volts must be set to “Off”)
QE4110 - Free-field, Class/Type 1 (optional) ¼-inch diameter (.276"), con-
denser (200 Volts must be set to “On”). Use for very high dB level free-field
measurements. Requires a special preamp to handle high levels. Please
contact 3M.
QE4130 - Free field, Class/Type 1 (optional), ½-inch diameter (.52"), con-
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Appendix A
denser (200 volts must be set to “On”). Use for general, higher-level, free-
field measurements.
QE4150 - Free-field, Class/Type 1 (optional) ½-inch diameter (.52"), con-
denser (200 volts must be set to “On”). Use for general free-field measure-
ments.
QE4170 - Pressure, Class/Type 1 (optional), 1-inch diameter (.938"), con-
denser (200 volts must be set to “On”). Use for coupler measurements, audi-
ometer calibration, low-frequency measurements, low level measurements
(due to low noise floor) or as a laboratory standard.
Characteristic
Accuracy
BK4936
Class 1
Electret
½
QE7052
Class 2
Electret
½
QE4110
Class 1
200V
¼
QE4130
Class 1
200V
½
QE4150 QE4170
Class 1
200V
½
Class 1
200V
1
Polarization
Diameter (inches)
Response
Free- Field
Free- Field Free- Field Free- Field Free- Field Pressure
characteristic
Frequency response 8 Hz to 20 kHz
(± 2 dB)
20 Hz to 17
kHz
20 Hz to 5 Hz to 24.5 5 Hz to 20 3 Hz to 10
24.5 kHz
kHz
-36
15.8
10
kHz
-26
50
0
kHz
-26
50
Sensitivity (dBV)
Sensitivity (mV)
-28
40
0
-29
35
0
-49.1
3.5
-
dB noise (1 kHz third-
octave band)
-1
dBA noise
dBC noise
dBZ noise
dBF noise
22
31
35
40
27
22
31
35
40
27
-
-
32
41
45
50
37
22
31
35
40
27
18
21
25
33
23
-
-
Mic range dBA min.
(recommended)
60
dB Peak
142
12
143
15
167
6.5
150
18
143
18
140
60
Nominal capacitance
(pF)
Part number
059-523
056-317
059-413
058-659
058-489 058-488
AC/DC outputs
Connector - One 3.5 mm stereo plug connector for both AC and DC outputs.
AC output ~ Meter 1 output, and includes the frequency response setting for
that meter. The AC output is affected by the instrument’s range setting.
DC output - Meter 1 output, and includes the effects of the time response
and frequency weighing for the meter.
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Appendix A
Communications ports
Auxiliary - For trigger signals and RS-232 communication.
USB - Mini USB connector. This port is used for data and file transfers
between the instrument and a personal computer.
Measurements
Types
SPL measures - SPL, Average value (Lavg or Leq), Maximum value (LMx),
Minimum value (LMn), Peak value (LPk).
Noise dosimetry - Sound Exposure Level (SEL), Time Weighted Average
(TWA), Projected TWA (PTWA), Taktmaximal (TAKTMX), Dose, Projected
Dose (PDSE), Exposure (EXP).
Community noise dosimetry - Exceedance (Ln), Day-Night average (Ldn),
Community Noise Exposure Level (CNEL), SPL difference for “C” and “A”
time response settings (Lc-a).
Overload Time (OL) - The percentage of time over the OL setting.
Ranges
Broadband - Eight selectable ranges of 90 dB each.
Filtered - Eight selectable ranges of 80 dB each.
Measurement parameters
Response time - Fast, slow and impulse.
Frequency weighting - A, C, Z and F (flat).
Threshold - 10 to 140 dB or OFF.
Exchange Rate (ER) - 3, 4, 5 and 6 dB.
Criterion Level (CL) - 40 to 100 dB.
Upper Limit (UL) - 10 to 140 dB.
Projected Time - 1 to 24 hours.
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Appendix A
Other
Maximum peak level - 3 dB over the full scale reading.
Calibration
Pre-calibration - When performed, valid prior to the start of a session.
Post-calibration - When performed, valid for the previous study in the ses-
sion.
Storage - All calibrations for a session are stored in the related session file.
Calibrators - All 3M Calibrators have an output of 114dB at 1 kHz, and some
may have other settings. See “Preparing to calibrate” in Chapter 6) or
additional information about calibrators.
Studies and sessions
Run-time clock - Duration of every run and session shown in screens as
well as added to the session file.
Manual operation - Run, Pause and Stop keys.
Programmed operation - Three Auto-Run modes:
•
•
•
Date (four options).
Day of the week (any time on any day).
Timed (future start time).
Triggered runs - Trigger on measured SPL or on external input. Triggers
can start a study, then either pause in the session or stop the session.
Triggered outputs - Output logic signals related to run status.
Special features
Security
Runs - Prevents the pausing of a study without first providing a 4-digit code.
Setups - Prevents the changing of settings without first providing a 4-digit
code.
Codes - Run and setup security can use different codes.
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Appendix A
Back-erase
Erasing - Up to 20 seconds of sampled SPL data can be removed from the
end of the last study. When removed, all calculations based on the removed
segment of data are immediately updated.
Editing - The length of the back-erased segment can be edited.
Storage - Data removed by back-erasing is retained in the session file.
Logging (optional)
Measurements - User-selectable for each of the two meters. Includes two
measurements of exceedance for Meter 1 (only for logging intervals equal or
greater than one minute).
With filtering - If a filtering option is installed, either broadband or filtered
logging can be selected, where filtered logging will depend upon the analysis
type setting for the session.
Logging interval - User-selectable from among 11 settings ranging from 1
second to one hour.
Part numbers
Replacement parts
Part Number Description
053-840
SoundPro SE/DL Class 1 BK4936 microphone kit (BK4936 microphone,
056-990 microphone-to-calibrator adapter and 059-344 windscreen).
SoundPro SE/DL Class 2 QE7052 microphone kit (QE7052 microphone,
056-990 microphone-to-calibrator adapter and 059-344 windscreen).
SoundPro SE/DL standard preamp.
053-841
053-700
017-524
053-575
056-164
058-115
059-344
WS-307-5
SD card.
SoundPro SE/DL USB cable to pc.
Wrist strap, 1/4" - 20.
WS-3 windscreen for 1.0" microphone. Package of 3.
WS-7 windscreen for 0.5" microphone. Package of 3.
Windscreen for 0.25" microphone. Package of 5.
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134
Appendix A
Optional parts
Part
Description
Number
053-842
SoundPro SE/DL Class/Type 1 QE4170 microphone kit (QE4170 microphone
and machined adapter to preamp).
053-843
053-844
SoundPro SE/DL Class/Type 1 QE4130 microphone kit (QE4130 microphone,
056-990 microphone-to-calibrator adapter and 059-344 windscreen).
SoundPro SE/DL Class/Type 1 QE4110 microphone kit (QE4110 microphone,
microphone-to-calibrator adapter and 059-344 windscreen).
059-413
058-659
058-489
058-488
053-571
057-860
056-981
056-982
QE4110 free field microphone, 0.25" condenser type.
QE4130 free field microphone, 0.5" condenser type.
QE4150 free field microphone, 0.5" condenser type.
QE4170 pressure microphone, 1" condenser type.
9V Switching-type, universal power supply.
Detection Management Software
QC-10 Calibrator; 114dB at 1000 Hz Output.
QC-20 Calibrator; Selectable 94dB or 114dB at 250 Hz or 1000 Hz Output.
Part
Description
Number
056-990
059-045
053-851
053-852
053-853
053-870
058-700
053-729
016-127
053-372
059-703
053-711
1/2 inch Microphone-to-calibrator adapter for QC-10 and QC- 20 calibrators.
TP-1 tripod (height range: 18.5 in. - 48.9 in.).
SoundPro preamp extension cable, 1 M.
SoundPro preamp extension cable, 3 M.
SoundPro preamp extension cable, 15 M.
SoundPro automobile cable.
AC/DC cable.
Serial Connector Cable
AC/DC output cable
Direct coupled input adapter
BNC preamp Input adapter with 18 pF capacitor.
SoundPro SE/DL carrying case.
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135
Appendix A
Port pinouts
AC/DC jack
The pinout for the jack used for the AC/DC signals is displayed below in
Figure A-1. This 3.5 millimeter jack is the same type of jack commonly used
for stereo outputs in music systems.
Figure A-1: Pinout for the AC/DC output jack
Auxiliary connector
The auxiliary connector in the base of the instrument can be used for input
and output triggers (See “Triggers”) to receive GPS signals or for RS-232
serial communications. Figure A-2 shows the pinout for the auxiliary
connector.
Figure A-2: Auxiliary connector
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APPENDIX
137 Appendix B
B
Glossary of Terms
C-A
The C-A measurement is an SPL average that enhances the low- frequency components of
the sound signal.
Figure B-1: C-A weighting response curve
Center frequency
The center frequency of each octave and third octave filter band.
CNEL
Community Noise Exposure Level. The accumulated exposure to sound measured in a 24-
hour sampling interval and artificially boosted during certain hours. For CNEL, samples taken
between 7 p.m. and 10 p.m. are boosted by 5 dB; samples taken between 10 p.m. and 7 a.m.
are boosted by 10 dB. The values reported by SoundPro SE/DL ignore the threshold and use
a 3 dB Exchange Rate, regardless how those parameters are set.
Criterion Level
Criterion Level. The average SPL that would result in 100% dose over the Criterion Time
(usually 8 hours).
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138 Appendix B
CT
Criterion Time. At the Criterion Level, the time period over which the resulting dose is 100%.
Usually is 8 hours.
dB
Sound Level Meters use the decibel as the unit of measure known as Sound Pressure Level
(SPL). SPL uses the ratio between a reference level of 20 microPascals (.00002 Pascals)
and the level being measured.
SPL = 20 log (measured level/reference level)
Example: the SPL for 1 Pascal is 20 log (1 Pascal/.00002 Pascal) = 94 dB 20 microPascals
(.00002 Pascals) is considered the average threshold of hearing.
A whisper is about 20 dB. A normal conversation is typically from 60 to 70 dB, and a noisy
factory from 90 to 100 dB. Loud thunder is approximately 110 dB, and 120 dB borders on the
threshold of pain.
Dose
Related to the Criterion Level, a dose reading of 100% is the maximum allowable exposure to
accumulated noise. For OSHA, 100% dose occurs for an average sound level of 90 dB over
an 8 hour period (or any equivalent exposure). By using a TWA reading rather than the
average sound level, the time period is no longer explicitly needed. A TWA of 90 dB is the
equivalent of 100% dose. The dose will double (halve) every time the TWA increases
(decreases) by the Exchange Rate.
Example: OSHA uses an Exchange Rate of 5 dB. Suppose the TWA is 100 dB.
The dose would double for each 5 dB increase over the Criterion Level of 90 dB.
The resulting dose is therefore 400%. If the TWA was instead equal to 80 dB then
the dose would halve for each 5 dB below the Criterion Level. The resulting dose
would be 25%.
When taking noise samples less that the full workday, dose is an easy number to
work with because it is linear with respect to time.
Example: If a 0.5 hour sample results in 9% dose and the workday is 7.5 hours
long, then the dose for the full workday would be a 135% dose (7.5 / 0.5 x 9%).
This is computed making the assumption that the sampled noise will continue at
the same levels for the full 7.5 hour workday.
Dynamic range
The range of input amplitudes on any given range setting over which the instrument can
produce a meaningful response. The bottom of the dynamic range is the instrument’s Noise
Floor for that range setting, and the top of the dynamic range is the maximum input signal
that will not overload the instrument on that range setting.
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139 Appendix B
Exceedance Level (Ln)
Exceedance levels represent the percent of the run time that was spent at or above the
corresponding dB level.
Example: An L40 equal to 73 dB would mean that for 40% of the run time, the
decibel lever was equal to or higher than 73 dB.
Exceedance levels can be set from 1% to 99%.
Exchange Rate (ER)
Also known as the Doubling Rate, this refers to how the sound energy is averaged over time.
Using the decibel scale, every time the sound energy doubles, the measured level increases
by 3 dB. This is the 3 dB Exchange Rate that most of the world uses. For every increase of 3
dB in the time weighted average, the measured dose would double.
Some organizations such as OSHA in the U.S. have argued that the human ear self
compensates for changing noise levels and they felt that the 3 dB Exchange Rate should be
changed to more closely match the response of the human ear. OSHA currently uses a 5 dB
Exchange Rate which would mean that the reported dose would double with every 5 dB
increase in the time weighted average. The Exchange Rate affects the integrated reading
LAVG, Dose, and TWA but does not affect the instantaneous sound level.
ExpHrs
Hours of sound exposure. Accumulated exposure to sound measured in hours using an
Exchange Rate of 3 dB. The display will switch to ExpSec if RTIME is less than one hour.
eq – 94) ⁄ 3.01
EXPHrs = [2(L
]
Pa2H
-------------------
RTIME
3600
OR
ExpSec
Seconds of sound exposure. Accumulated exposure to sound measured in seconds using an
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140 Appendix B
Exchange Rate of 3 dB. The display will switch to ExpHrs if RTIME is greater than 3600
seconds.
EXPSec = [2(L – 94) ⁄ 3.01] RTIME Pa2S
eq
Level (LFT)
Notation used to represent sound pressure level measurements in IEC/ISO notation, where
the measurements are made with particular frequency (F) and time (T) response parameters.
For an actual measurement, the F and T parameters are replaced by standardized notation
for those parameters.
L_AV
Average sound level measured over the run time. This becomes a bit confusing when
thresholds are used. Any sound below the threshold is not included in this average.
Remember that sound is measured in the logarithmic scale of decibels therefore the average
can not be computed by simply adding the levels and dividing by the number of samples.
When averaging decibels, short durations of high levels can significantly contribute to the
average level.
Example: Assume the threshold is set to 80 dB and the Exchange Rate is 5 dB (the settings
of OSHA’s Hearing Conservation Amendment). Consider taking a one hour noise
measurement in an office where the A- weighted sound level was typically between 50 dB
and 70 dB. If the sound level never exceeded the 80 dB threshold during the one hour period,
then the LAVG would not indicate a reading of zero. If 80 dB was exceeded for only a few
seconds due to a telephone ringing near the instrument, then only those seconds will
contribute to the LAVG resulting in a level perhaps around 40 dB (notably lower than the actual
levels in the environment).
Lavg = ER log2 RTIME 2LS ⁄ ER dt – log2 (RTIME) dB
∫
0
L_EQ
The true equivalent sound level measured over the run time. The term L_EQ is functionally the
same as L_AV except that it is only used when the Exchange Rate is set to 3 dB and the
threshold is set to none.
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141 Appendix B
LDN
Representing the Day/Night sound level, this measurement is a 24-hour average sound level
where 10 dB is added to all of the readings that occur between 10pm and 7am. This is
primarily used in community noise regulations where there is a 10 dB “penalty” for night time
noise. Typically LDN’s are measured using A weighting, a 3 dB Exchange Rate, and no
Threshold.
L_Mn
Minimum SPL. Lowest SPL measured over a time interval.
L_Mx
Maximum SPL. Highest SPL measured over a time interval.
Logging
In sound studies, the saving of measurements at fixed intervals during a study, where each
measurement is determined from data processed in the previous logging interval.
L_Pk
Peak SPL. This is the highest SPL value obtained during a study or a session. A peak SPL
measurement is affected by the frequency response setting but not by the time response
setting of the meter.
Octave band
An Octave band is defined as a frequency band whose upper band-edge frequency is twice
the lower band frequency.
Noise
Unwanted sound.
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142 Appendix B
NCB (Balanced Noise Criterion Curves )
This is the most recent incarnation of the curves based on Beranek’s work (1987). This curve
family goes beyond a simple tangency method to try to ensure a more neutral characteristic
to the noise spectrum and also accounts for speech interference such as: rumble, rattle, and
hiss. NCB was recommended for use with HVAC systems and similar applications and
accounts for lower frequency sounds in comparison to NC curves.
When setting NCB as the type on the meter, you should use S12.1 unless a local ordinance
or similar requirement specifies the use of a tangency technique. (This is usually specified in
a standard.)
Noise Criterion Curves (NC)
With NC curve evaluation, sound is measured in octave bands in 8 octave bands ranging
from 63 to 8000 Hz and is then plotted on the octave band spectrum using a set of curves.
NC curve evaluation uses a tangency method. A tangency method is a process of
comparing your measurements to a fixed curve. The correct curve number is the lowest
curve that meets or exceeds the measured octave values. Typically, this is used in HVAC
applications.
Noise Rating Curves (NR)
This curve family is a tangency technique and is used primarily in Europe and Australia. It is
used not only for HVAC and machine noise applications, but also in community noise
enforcement.
Noise Floor
The signal magnitude at the bottom of the instrument’s linear range. Input signals below the
noise floor cannot be differentiated from the internal noise of the instrument.
Overload (OL)
An overload will occur whenever the input signal exceeds the dynamic range of the
instrument.
Pascal (Pa)
Unit of pressure equal to 1 Newton per square meter.
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143 Appendix B
PTWA
This is a projected TWA determined for a projected time (Prt) in relation to the Criterion Time
(CT) as follows.
Prt
--------
CT
TWA = Lavg + ER log2
dB
Peak –C
The following chart illustrates the range of Sound Level with C-weighted Peak.
Peak C Level Range
Level Range (dB)
-20 to 70
Peak C Level Range (dB)
42.2 to 73
Level Range (dB)
20 to 110
(dB)
42.7 to 113
46.7 to 123
55.4 to 132
66.3 to 142
-10 to 80
42.6 to 83
30 to 120
0 to 90
41.6 to 93
40 to 130
10 to 100
43.4 to 103
50 to 140
Preferred Noise Criterion (PNC) Curves
The Preferred Noise Criterion Curves, a type of tangency method, was an update to
Beranek’s original NC curves that accounted for the lower frequency side of the criterion
curves (1971). The PNC curves extended the range to 32 Hz instead of 63 Hz used in NC
curves.
Projected time (Prt)
A time interval used in some calculations, usually different from the actual run time of a study
or session.
Reference pressure
The sound pressure at the threshold of human hearing, as measured under standard
conditions. This generally accepted magnitude of this pressure is 2 × 10-5 Pascals (Pa).
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144 Appendix B
Response time (F,S, I)
Selectable time response settings used in SoundPro SE/DL measurements. The response
time is a standardized exponential time weighting of the input signal according to fast (F),
slow (S) or impulse (I) time response relationships. Time response can be described with a
time constant. The time constants for fast, slow and impulse responses are 0.125 s, 1.0 s and
35 ms, respectively. Impulse time response is 35ms rise with a constant decay of 2.9dB/sec.
Burst duration, t (seconds)
Figure B-2: Slow response to a tone burst
Burst duration, t (milliseconds)
Figure B-3: Fast response to a tone burst
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145 Appendix B
Burst duration, t (milliseconds)
Figure B-4: Impulse response to a tone burst
Room Criterion Curves (RC)
Room Criterion curve’s was introduced in 1981 by Blazier to primarily rate noise in
offices/room acoustics. This methodology calculates a numerical rating based on speech
interference and indicates any interference such as hissing, rumbling, or vibration.
SEL
Sound Exposure Level. The continuous SPL lasting one-second that would deliver the same
sound exposure as an accumulated exposure determined over a sampling interval (RTime).
SEL is typically determined with a 3 dB Exchange Rate, slow exponential time-weighting, and
without regard to an Integrating Threshold.
SEL = ER log2 RTIME 2L ⁄ ER dt dB
∫
0
SPL
Sound pressure level. A ratio of one sound pressure to a reference pressure (See Reference
Pressure on page 141). Because of the enormous dynamic range of the human ear, the ratio
is calculated logarithmically by the formula below, where Lr is the reference pressure.
L
SPL = 20 log
dB
----
Lr
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146 Appendix B
Taktmx
A time average over a sampling interval that uses the highest level occurring during the
preceding Taktmaximal Interval, either three or five seconds, and assumes that it was
present for the whole Taktmaximal Interval.
Third-octave band
A Third-octave band is defined as a frequency band whose upper band- edge frequency is
1.26 times the lower band frequency.
Threshold
An SPL value that defines a lower level of acceptable values. Only SPL samples that exceed
the threshold are used in some calculations.
TWA
Time weighted average. The constant SPL over an 8-hour interval that would produce the
same exposure to sound as an exposure measured over a run time sampling interval (Rtime).
TWA = ER log2 RTIME 2L ⁄ ER dt – log2 (CT) dB
∫
0
Upper Limit (UL)
The total time during a study that the SPL exceeds the Upper Limit meter setting.
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147 Appendix B
Weighting (A, C, Z, F)
SPL measurements are commonly weighted (scaled) in relation to their frequency
components in order to provide a consistent basis for comparison to other measurements of
the same type. In addition to the standardized A, C and Z weighting curves, you can select F-
weighting (flat) which provides no weighting at all. The four SoundPro SE/DL weighting
curves are plotted together in Figure B-5, where the F-weighting curve has been shifted up by
5 dB for graphical clarity. The tolerance limits for F frequency weighting are the same as A,
C, and Z frequency weighting.
Figure B-5: All frequency weightings plotted together
Windscreen
A covering for a microphone that reduces disturbances caused by wind and direct contact
with other surfaces.
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148 Appendix B
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149 Appendix C
APPENDIX
C
Customer service
Customer service
Contacting 3M Instrumentation
Should your 3M equipment need to be returned for repair or for recalibration, please contact the
service department at the following number or access the online form via the website. For
technical issues, please contact Technical Support.
Service Department and Technical Support: 1 (800) 245-0779.
Fax: 1 (262) 567-4047. Office hours are 8:00 a.m. to 5:00 p.m. United States Central.
•
•
International customers
Contact your local, factory-authorized distributor from whom the product was purchased. You can
obtain the name and contact information of your local factory-authorized distributor from 3M by
using the e-mail, telephone, or fax information given under “Contacting 3M” above.
Calibration
The SoundPro and 3M field calibrator devices should be examined regularly by the factory. An
annual calibration is recommended. (Please see Service Department above.)
.
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150 Appendix C
Warranty
TM
3M SoundPro Sound Level Meter LIMITED WARRANTY. 3M warrants SoundPro Sound Level
Meter will be from free defective materials and workmanship for one year from date of purchase
(indicated on the sales receipt), provided it is maintained and used in accordance with 3M
instructions and/or recommendations. If any component becomes defective during the warranty
period, it will be replaced or repaired free of charge. This warranty does not apply to units that have
been altered or had repair attempted, or that have been subjected to abuse, accidental or
otherwise. The above warranty is in lieu of all other express warranties, obligations or liabilities. For
warranty outside the United States, a minimum of one year warranty applies subject to the same
limitation and exceptions as above with service provided or arranged through the authorized 3M
distributor or our 3M European Service Laboratory. Foreign purchasers should contact the local 3M
authorized sales agent for detail. THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR PARTICULAR PURPOSE ARE LIMITED TO ONE YEAR FROM THE PURCHASE
DATE. 3M shall not be liable for any other warranty, express or implied, arising out of or related to
the appropriate use of hearing protection devices. Manufacturer or its agent’s liability shall be
limited to replacement or repair as set forth above. Buyer’s sole and exclusive remedies are return
of the goods and repayment of the price, or repair and replacement of defective goods or parts.
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151 Index
APPENDIX D: INDEX
AC/DC
Captured curves
Output explained................................. 122
Port location............................................ 7
Alternate functions
Indicator ................................................ 20
Altf............................................................. 19
Arrows....................................................... 19
Attaching calibrator to the SoundPro......... 62
Audiometric background curves
Running.................................................90
Captured curves
Applications...........................................87
Runing and viewing results....................96
Setting up ..............................................88
Center frequency
Defined................................................137
CNEL
Setting-up.............................................. 94
Audiometric Background curves
Defined................................................137
Communications
Running................................................. 96
Auto-Run
View measurements remotley (log-to-port) ...53
Contacting 3M .........................................149
Criterion curves
Running.................................................96
Setting-up..............................................92
Types.....................................................91
Criterion Level
Date setting........................................... 38
Days of week......................................... 40
Setting date........................................... 39
Auto-run shutdown screen ........................ 42
Auxiliary
Port location............................................ 7
Average SPL
Defined................................................137
CT
Defined; ................................................... 140
Back-erasing
Defined................................................138
dB
Explained .............................................. 72
Results.................................................. 73
Backlight ................................................... 19
Setting................................................... 35
Backlight setting........................................ 35
Balanced noise criterion curves
Defined................................................138
DC output
Explained.............................................123
Display.......................................................19
DMS
Retrieve data.......................................121
Retrieving your data diagram...............122
DMS
Defined................................................ 142
Batteries
Checking or changing ........................... 15
Indicator ................................................ 20
Installing................................................ 14
Power explained.................................... 15
C-A
Defined................................................ 137
C-A measurement..................................... 30
Calibrate
Back-erased data ..................................73
DMS
Downloaded.........................................122
Explained.................................................9
Retrieving data ....................................121
Dose
Defined................................................138
Dynamic range
About..................................................... 61
History cal screen.................................. 64
Post-cal................................................. 61
Pre-Cal.................................................. 61
Steps..................................................... 62
Calibrating........................................... 61, 63
Defined................................................138
Enter..........................................................19
Exceedance Level (Ln)
Defined................................................139
Exchange Rate (ER)
Defined................................................139
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152 Index
ExpHrs
Setting measurement type.....................26
Third-octave band....................................3
Measurements
Defined................................................ 139
ExpSec
Defined................................................ 139
File Setups(Config)
Creating or saving............................... 118
Files
Loading and deleting........................... 115
Naming/Renaming .............................. 117
FSetup Files (Config)
Creating or saving............................... 118
GPS
Explained .............................................. 54
Setting................................................... 55
Hardware interface...................................... 6
Indicators
Explained .............................................. 20
Information screen
Explained ................................................ 8
Keypad
Example................................................ 18
Explained .............................................. 19
L_EQ
Defined................................................ 140
L_Mn
Defined................................................ 141
L_Mx
Defined................................................ 141
L_Pk
Defined................................................ 141
LDN
Defined................................................ 141
Level (LFT)
Defined................................................ 140
Level-triggered
Screen explained .................................. 44
Lock screen............................................... 47
Log -to-Port............................................... 53
Logging
Defined................................................ 141
Setup screen......................................... 32
Measurement
Audiometric background curves ............94
Bar chart................................................68
Changing what is displayed...................66
Community noise...................................69
Criterion curves .....................................91
Curves explained...................................87
Dosimetry screen...................................70
Filtered bar chart ...................................68
Indicators/descriptors ............................67
Navigational screens explained.............65
Pause ....................................................75
Running.................................................64
Setting captured curves.........................88
STI-PA testing .......................................98
Stop.......................................................75
Tabulation screen..................................71
Time History ..........................................72
Measures setup screen
Gender field.........................................100
Post process field ................................101
Memory card
Slot location.............................................6
Memory Card
About...................................................120
Ejecting................................................121
Formatting ...........................................120
Microphone
Installing ................................................12
Installing windscreen .............................13
Models.........................................................1
Navigating
Keypad ..................................................21
NCB
Defined................................................142
Noise
Defined................................................141
Noise Criterion Curves (NC)
Defined................................................142
Noise Floor
Changing Display.................................. 66
Explained .............................................. 29
IEC/ISO................................................. 57
Octave bands.......................................... 2
Overview............................................... 58
Range ................................................... 60
Defined................................................142
Noise Rating Curves (NR)
Defined................................................142
Octave band
Defined................................................141
On/off/esc
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153 Index
Identified................................................ 18
Turning off............................................. 21
Overload
Room Criterion Curves (RC)
Defined................................................145
Run
Indicator ................................................ 20
Overload (OL)
Defined................................................ 142
Pascal (Pa)
Indicator.................................................20
Lock.......................................................47
Run Mode security.....................................46
Running
Defined................................................ 142
Quick help list........................................58
Saving Setup...........................................118
Screens, general
Past data
Diagram.................................................18
Start.......................................................16
Screens, setup
Battery check.........................................16
Comm-Set; ............................................54
Screens, time-history/back-erase ..............72
Screens, viewing
Community noise...................................69
Dosimetry screen...................................70
File.......................................................112
Filtered bar chart ...................................68
Icons......................................................67
Past Measurements.............................115
STI-PA.................................................104
Tabulation..............................................71
Tabulation screen..................................71
Time log.................................................72
Screens, Viewing
Viewing ......................................112
Past Data
Loading and deleting files ................... 115
Pause
Indicator ................................................ 20
Peak –C
Defined................................................ 143
Power jack
Location .................................................. 7
Power supply
Auto and universal explained................ 17
Connecting............................................ 17
Pre-Calibrate history screen...................... 63
Preferred Noise Criterion (PNC) Curves
Defined................................................ 143
Projected time (Prt)
Defined................................................ 143
PTWA
Bart chart...............................................68
Screens,viewing
Defined................................................ 143
Reference pressure
Bar chart................................................64
Secure mode
Defined................................................ 143
Response time
Disabling and backup number...............49
Secure run
Fast, slow, impulse................................ 27
Response time (F,S, I)
About.....................................................46
Secure run/setup
Defined................................................ 144
Reverberation
Setting ...................................................47
Secure setup
About.....................................................46
Secure Setup.............................................49
SEL
Defined................................................145
Sessions
Explained...............................................59
Introduced..............................................75
Scenario ................................................59
Setup files(Config)
About..................................................... 77
Impulse noise method........................... 79
Interrupted noise method ...................... 79
Reverb time (RT60)............................... 78
Reverb Time example chart.................. 78
RT60 measurement mode..................... 83
RT60 Test ............................................. 82
Setup options........................................ 80
Setup screen......................................... 80
Review
Indicator ................................................ 20
Review mode .......................................... 113
Deleting ...............................................119
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154 Index
Loading ............................................... 119
Setup files(Config.)
Viewing ............................................... 119
Setup screen
Auto-run with date of week.................... 40
Backlight................................................ 35
Contrast................................................. 36
Display .................................................. 33
Language.............................................. 34
Measaurement type .............................. 26
Meter 1 and meter 2 parameter............. 27
Time and date ....................................... 25
Setup screens
Steps, applying captured curves..........108
Viewing result screens.........................104
Stop...........................................................19
Indicator.................................................20
Stop and pause
Explained...............................................75
Studies
Explained...............................................59
Study
Scenario ................................................59
Taktmx
Defined................................................146
Third-octave band
Microphone/signal input ........................ 24
Softkey
Defined................................................146
Threshold
Lookup .................................................. 66
Softkey buttons ......................................... 19
Softkey menu............................................ 19
Softkeys
Explained .............................................. 66
SoundPro SE or DL kit.............................. 11
Speech Transmission Index
Explained .............................................. 98
SPL
Defined................................................ 145
STI-PA
Applying background noise (capture
curve) overview................................... 108
General setup guidelines .................... 100
Modulation envelope screen ............... 106
Modulation screen............................... 105
Running a study.................................. 103
Setup................................................... 100
Defined................................................146
Timed Run.................................................43
Triggering
Setting ...................................................50
Turning off .................................................21
TWA
Defined................................................146
Underrange
Indicator.................................................20
Upper Limit (UL)
Defined................................................146
USB port location........................................6
Weighting ..................................................27
Weighting (A, C, Z, F)
Defined................................................147
Windscreen
Defined................................................147
Models SE and DL
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About Us
3M Detection Solutions is a world class manufacturer of rugged, reliable instrumentation and software systems
that help monitor and evaluate occupational and environmental health and safety hazards, including noise
dosimetry, sound level monitoring, heat stress, indoor air quality and select toxic/combustible gases. The 3M
Detection brand of instrumentation is used by safety and industrial hygiene professionals to help comply with
applicable occupational standards and regulations.
About 3M Personal Safety
3M offers a comprehensive, diverse portfolio of Personal Safety solutions providing respiratory protection,
hearing protection, fall protection, reflective materials for high visibility, protective clothing, protective
eyewear, head and face protection, welding helmets, and other adjacent products and solutions such
as tactical safety equipment, detection, monitoring equipment, active communications equipment and
compliance management. In 2012, 3M celebrated 40 years of safety leadership – recognizing the company’
respiratory and hearing protection solutions introduced in 1972. Visit www.3M.com/PPESafety or http://
m.3m.com/PPESafety
Personal Safety Division
3M Detection Solutions
ISO 9001 Registered Company
ISO 17025 Accredited Calibration Lab
1060 Corporate Center Drive
Oconomowoc, WI 53066
Customer Service: 262-567-9157
Toll Free: 800-245-0779
3M and SoundPro are trademarks of 3M
Company, used under license in Canada.
Please recycle. Printed in USA.
© 2014 3M Company
All rights reserved.
053-576 Rev.L 8/14
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