Dahua DHI-NVR5224-24P-4KS2 User Manual page 403

5.10.3.6 Audio Detect (Optional)
System can generate an alarm once it detect the audio input is abnormal or audio volume changes.
From main menu->Setup->Event->Audio detect, you can see an interface shown as in Figure 5-88.

Input abnormal: Check the box here, system can generate an alarm once the audio input is
abnormal.

Intensity change: Check the box here, system can generate an alarm once the audio volume
becomes strong.

Sensitivity: It refers to the audio recognition sensitivity. The higher the value is , the higher the
sensitivity is.

Threshold: It is to set intensity change threshold. The smaller the value is, the higher the sensitivity
is.
For detailed setups, please refer to chapter 5.10.3.1.1 motion detect for detailed information.
Figure 5-87
Figure 5-88
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