Larson Davis SoundAdvisor 831C Reference Manual page 62

FIGURE 6-9 Setup Manager: Day/Night Setting Tab
SoundAdvisor Model 831C
1.
2.
Step 10
If enabled on your meter, use the right (
Event History tab. For information on choosing these settings, see Module 17
Using Event History.
Step 11
If enabled on your meter, use the right (
Markers tab. For information on choosing these settings, see Module 18 Using
831C Sound Recording.
Step 12
Use the right (
shown in Figure 6-9.
Although the ISO 1996-2:2007 standard specifies which default
values should be used to calculate LDEN, in practice, the time
values defining the day, evening, and night periods may be
changed.
This is permitted by Directive 2002/49/EC of the European
Parliament and of the Council of 25 June, 2002 relating to the
assessment and management of environmental noise. Because of
these recommendations and the versatility of the standard on this
point, it's important to verify these values using the formulas for
L
DN
L
DN
night level. The formulas for each are shown in
Glossary on page C-1.
values on this page.
Creating a Custom Setup File On the Meter
1.
SPL Trigger Levels: When the measured SPL (Slow, Fast, or
Impulse) is greater than the trigger level you set here, the
exceedance begins. The measured SPL is defined by the current
weighting and detector.
2.
Peak Trigger Level: Set 3 peak levels independent of the
SPL triggers. Because the peak is associated with Fast detec-
tion time, these triggers can identify impulsive noises (e.g., gun
shots), which would not normally be measured.
//*
) softkey to navigate to the Day/Night Setting tab as
and L prior to making the measurement.
DEN
is the default day/night level, L
Use the formulas, and enter the resulting
//*
) softkey to navigate to the
//*
) softkey to navigate to the
is the default day-evening-
DEN
Appendix C
6-6