3M DL, SE Audiometric background curves

94 Audiometric background curves

Setting up audiometric background curves

Models SE and DL

Audiometric background curves

The SoundPro SE/DL series supports the following t wo types of audiometric

test room sound level curves:

• Audiometric Test Room Background Sound Level Curves (OSHA)

which compares the ambient noise readings to the m aximum

permissible ambient noise levels (MPANLs) at 500 H z, 1K, 4K, 8K as

specified by the OSHA Hearing Conservation Amendm ent (1983).

• Audiometric Test Room Background Sound Level Cur ves (ANSI)

which compares the ambient noise to selectable crit erions specified

in ANSI S3.1-1999 and allows for a variety of audiom etric 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 proc edures.

 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 sof tkey.)

Figure 6-14: 1/1 or 1/3 octave measurement type for audiometric testing

Selecting measurement type

Press first softkey until 1/1 or

1/3 is selected

Contents

Main 3MTM SoundPro Sound Level Meter Dangers, Warnings, Cautions & Battery T AB LE OF CONTENTS Page Page Page Page Page Page Page Page TABLES xii Table of Contents 1 Models and options Octave bands Introduction Models and options Figure 1-1: SoundPro Models SE and DL and Option 1 and Option 2 Class/Type 1 Frequency resolution Octave bands Third -octave bands Naming bands 4 Frequency resolution Analysis type STI-PA -Speech Intelligibility Logging explained Physical Characteristics The Display Hardware interfaces Memory card slot AC/DC port Power jack Auxiliary port Information screen Screen contents Detection Management Software DMS DMS Start Page Page Getting Started Checking the equipment Installing the preamp Microphone and accessories 13 Microphone and accessories Class/Type 1 and Class/Type 2 instrument BK4936 microphone - Remove the microphone from its case and thread it on the All other Class/Type 1 microphones - Remove the microphone from its Class/Type 2 microphones Remove the Providing power Installing Batteries Battery power explained Checking or changing type 16 Providing power Battery Check screen Using power supply or auto adapter Turning on Start screen and the keypad SoundPro functionality The keypad explained Indicators explained Navigating Turning off Page Basic setups Changing microphone settings Time and date Measurement type (SLM, 1/1, 1/3, STI-PA, RT60) Meter 1/Meter 2 Parameters (i.e. response time, weighting) Figure 3-4: Meter 1 and Meter 2 parameters Measurement setup (for community noise) C-A measurement settings Logging Logging options Exceedance level Filters Setting logging options Setting up display options Language Backlight Contrast Advanced setups setups. Auto-Run Setting up auto-run Date setting Days of week setting Auto-run shutdown screen Auto-run shutdown screen explained Timed run setting Level-triggered auto-on setting 5. To select the Mode, press Enter repeatedly until you are viewing Locking setup or run mode Setting secure run or secure setup (locking) About Secure Run About Secure Setup Page Disabling secure run or secure setup (unlocking) Secure code backup number Digital outputs/Triggering Tracking runs Enabling or Disabling run/pause digital outputs/triggers Digital outputs and SPL Managing SPL digital outputs (See Figure 4-13 above) Communications QSP/Serial Mass Storage Viewing real-time measurements remotely GPS The SoundPro has the capability of embedding GPS information into s tudy GPS display GPS explained Page Page Preparing to measure & running Virtual meters Meter 1/Meter 2 explained Measurement notation (IEC/ISO) Overview of running a session/study 59 Preparing to measure Explanations Preparing to measure Sessions and Studies The following components explain how the data is stored on the instrument. Table 5-2: Sessions and studies explained CAUTION: The memory card should not be inserted or removed during a study you can lose data. Measurement range - NOTE: The bar chart screen may appear with a different measurement Calibrate Calibration screen Pre-Calibration Post-Calibration Performing a calibration 63 Calibrate Figure 5-3: Setting pre-cal screen Figure 5-4: Calibration history screen Running a session/study Measurement navigation Using softkeys in measurement screens Changing displayed measurement Analysis type, time response and weighting Measurement screen icons Descriptor types Measurement screens Bar Chart and Filtered Bar Chart Community Noise screen Dosimetry screen Dosimetry measurements Tabulation screens 1/1 and 1/3 octave analysis measurement results Time History/Back-erase screen Back-erasing Results of back-erasing Stopping a session Stopping and pausing Page RT60, Curves, and STI-PA 6 Additional options Reverberation Reverberation time (RT60) Reverberation (RT60) methods Interrupted noise Impulse noise 80 Additional options Reverberation options For Interrupted Noise method, level below this threshold will trigger For Impulse method, levels above this threshold will trigger the start Setting up reverberation Running reverberation test Reverberation results RT60 summary screen Viewing RT60 values of each band Deleting RT60 value in a filtered band Decay curve screen Tabular RT60 screen Curves Captured curves Captured curve applications 88 Captured curves Setting up captured curves Setting up Captured Curves Settings and measurement set tings 1. From the start screen, select either 1/1 octave or 1/3 octave for the 2. Next, select the measurement type, by selecting View Session (use 89 Captured curves 8. Depending on your selection in step 4, refer to the following: Figure 6-9: Captured Curves and Survey mode Running captured curves Criterion curve families Types of Criterion Curves Setting up criterion curves 93 Criterion curve families 3. Press On/Off/Esc to return to the start screen. 4. Figure 6-13: Curves setup screen example Audiometric background curves Setting up audiometric background curves Running and viewing curves Curve measurements and results Speech Intelligibility STI-PA testing Zones Selecting STI scale or CIS scale 99 Speech Intelligibility STI scale Common Intelligibility Scale (CIS) Conducting a STI-PA test (overview of steps) STI-PA setup 101 Speech Intelligibility Press the first softkey repeatedly until STI-PA appears. Page 103 Speech Intelligibility Conducting a level setup (for STI-PA) The average dB level is displayed when in stop mode. Figure 6-20: Level set-up and average decibel level Running a speech intelligibility study 1. The SoundPro should be powered on and you should be viewing the STI- STI-PA results screens STI-PA measurement and scale results screen STI-PA modulation screen STI-PA modulation envelope screen Storing background noise/capture curve 107 Speech Intelligibility When the level is stabilized, press the Capture key. (See Figure 6-26.) Applying captured curves for STI-PA testing Applying captured curves Page Page Viewing Past Measurements Files File directories File directory screen explained Page Loading and deleting files Session directory Navigating in a session/config. directory Naming and renaming files Configuration directory Saving (& naming) setup file (config. file) Viewing, loading, deleting setup files (config.) Memory card Compatibility Formatting a card with the SoundPro CAUTION: A Quick Format may be used to delete all files fr om the card. Communicating Communicating with a PC Using Detection Management Software DMS Using an external card reader Working with measurement data in DMS DMS and working with SoundPro data A B A B C AC/DC output AC/DC output AC output Table 8-1: AC output DC output Page Specifications Conformance to standards Acoustics EMC emissions and immunity References Electrical characteristics Power sources Internal power External power Preamplifier (removable) Meters Bandwidth Octave filters (optional) Third-octave filters (optional) Environmental effects Temperature Humidity User interface Display Keypad Languages Input/output AC/DC outputs Communications ports Measurements Types Ranges Measurement parameters Other Calibration Studies and sessions Special features Security Back-erase Logging (optional) Part numbers Replacement parts Appendix A 134 Optional parts Port pinouts AC/DC jack Auxiliary connector Page Glossary of Terms C-A Center frequency CNEL Criterion Level CT dB Dose Dynamic range ExpHrs ExpSec EXP 2 H Page NCB (Balanced Noise Criterion Curves ) Noise Criterion Curves (NC) Noise Rating Curves (NR) Noise Floor Overload (OL) PTWA Peak C Preferred Noise Criterion (PNC) Curves Projected time (Prt) Reference pressure Response time (F,S, I) Room Criterion Curves (RC) SEL SPL SPL 20 log L L Weighting (A, C, Z, F) Windscreen Page Customer service C Customer service Contacting 3M Instrumentation International customers Warranty APPENDIX D: INDEX Page Index 153 Viewing ......................................112 Page About Us About 3M Personal Safety