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3.7.3 Audio Detection
Note this function is only applicable to audio-in-supporting models.
Audio detection is used to detect abnormal audio volume. When the rise, fall, or change of
volume exceeds the set limit, or when the input volume reaches the set threshold, an alarm
is generated. Make sure audio input is enabled.
Figure 3-58
1. Select On to activate Audio Detection.
2. Select a Detection Type.
Sudden Rises: An alarm is reported when the rise of volume exceeds the set
Difference.
Sudden Fall: An alarm is reported when the fall of volume exceeds the set
Difference.
Sudden Change: An alarm is reported when the rise or fall of volume exceeds the
set Difference.
Threshold: An alarm is reported when the volume exceeds the set Threshold.
3. Set a Difference or Threshold.
4. For Trigger Actions and Plan, follow Step 6 ~ 7 at the bottom of 3.6.1.1 Cross Line.
Select the actions to be triggered by an audio alarm and set a schedule plan if needed. Refer
to 3.7.1 Motion Detection for detailed instructions.
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