Larson Davis SoundAdvisor 831C Reference Manual page 143

Specify Trigger Options
Review
TRY THIS
"Measurement Setup" on
page 6-1 and indicate all the
parameters for each setup
page that you need for your
measurement.
Specify Event History Options
FIGURE 17-3 Event History Settings
If you are using this
TAKE NOTE
feature with Sound
Recording, your Minimum
Duration cannot be more
than the time set for the
buffer. See "Sound
Recording" on page 18-1.
SoundAdvisor Model 831C
Step 3 With your setup highlighted, use the top right softkey to
navigate to Triggers. Keep triggers at default or indicate
new values depending on your measurement.
Step 4 Navigate to Event History.
Step 5 Check Event History then indicate the "Minimum
Duration" and "Continuation Period".
Minimum Duration
In situations where only noise events lasting longer than a certain time
interval are needed, you can select a minimum duration requirement
for the storage of noise events data. The maximum limit is 60 s.
Continuation Period
Each noise event is initiated when the sound level exceeds the SPL1 or
Peak 1 level. There may be situations where sound level drops below
the threshold for a short period of time before rising above it again, in
which case you may prefer to consider this a continuation of the event
rather than the conclusion of the event and the beginning of another.
Continuation Period is the time the sound level can fall below the
threshold level and still be considered in the same event.
Beginning when the levels both drop below their thresholds, if either
lever rises above its respective threshold over a time interval equal to
the continuation period, the noise event is considered complete. If,
however, there is an exceedance of a threshold during the continuation
period, the event is considered to be continued as if there had been no
level drop below a threshold.
Setting up the Measurement
Check Event History to
enable the feature.
17-3