SoundAdvisor Model 831C
Understanding Triggering Methods
17-9
FIGURE 17-10
Event History with Dynamic Triggering
FIGURE 17-11
Event History with Dynamic Triggering and Events
About the Background Level
The background sound level used with dynamic triggering is the user-
indicated
Ln
level (
Setup Manager
Ln Tab
), calculated using an
0
10
20
30
40
50
60
70
80
90
100
0:00:00
1:56:39
3:53:19
5:49:59
7:46:39
9:48:18
11:44:58
13:41:38
15:38:18
17:34:58
19:31:38
21:28:18
23:24:58
Leq
Background tracking level
Dynamic Trigger Level
The Leq is set the same as in
Figure
17-8 Event History with Level
Triggering.
The background level is
tracked throughout the
measurement.
The trigger level is adjusted
based on the background level
and an indicated offset. Here the
offset is 20 dB.
0
10
20
30
40
50
60
70
80
90
100
0:00:00
1:56:39
3:53:19
5:49:59
7:46:39
9:48:18
11:44:58
13:41:38
15:38:18
17:34:58
19:31:38
21:28:18
23:24:58
Leq
Background tracking level
Dynamic Event
Dynamic Trigger Level
With dynamic triggering, the exceedances only
occur if the level exceeds the background level
plus the offset. Here the offset is 20 dB.
The bars represent events logged during the
measurement. There are about 11 with a
Minimum Duration of 3 seconds.
