Larson Davis SoundAdvisor 831C Reference Manual page 62

FIGURE 6-4 Setup Manager: SLM Tab
1.
SoundAdvisor Model 831C
About Using the Gain Feature
When using a microphone with sensitivity of 50 mV/Pa, the input overload occurs
approximately as shown in Table 6.1.
Table 6.1 OBA Overload Levels
Input Gain, dB
0
20
0
20
About Integration Methods
Although the 831C measures levels at all 3 detector and frequency weighting settings
according to your selection, some features require a single combination. The level defined
by the detector and frequency weighting you select is used for the computation of Ln,
Exceedances, Sound Exposure, and Sound Events. However, some features may not be
available for Exponential Integration Method. See
Step 5.
If OBA is enabled for your meter, use the right softkey (
the OBA tab as shown in Figure 6-5.
1.
Select a Frequency Weighting, Detector, and Peak
Weighting. Your choice for the Detector setting
communicates to the meter hardware how quickly it
needs to begin measuring the current sound. See also
"Detector" in the
2.
2.
If you're unsure which Integration Method to
3. choose, select Linear, and see the section below called
About Integration Methods.
3.
Select the 20 dB Gain checkbox when measuring
low-level sounds, or when the sound level is close to
4.
the background noise level. For more information, see
the section below called About Using the Gain
Feature.
4.
The Running Leq Period is used when the Event
History option (831C-ELA) is purchased and enabled on
your meter. In this example, the period is the Leq of the
last 1200 seconds of the measurement run time. For
more information, see Module 17 Using Event History
Firmware.
OBA Range
High
High
Normal
Normal
Creating a Custom Setup File On the Meter
Appendix C Glossary on page C-1.
Overload Level, dB peak
143
123
110
90
Appendix C Glossary on page C-1.
//*
) to navigate to
57