Dahua NVR4204-P-4KS2 User Manual

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5.8.3.4 Audio Detect (Optional)
Please make sure you are connecting to the smart network camera, otherwise you can not use
IVS function!
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 5-72.
 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 5.8.3.1.1 motion detect for detailed information.
Figure 5-72
5.8.3.5 Alarm
Before operation, please make sure you have properly connected alarm devices such as buzzer. The
input mode includes local alarm and network alarm.
5.8.3.5.1 Local Alarm
The local alarm interface is shown as in Figure 5-73. It refers to alarm from the local device.

Dahua NVR4204-P-4KS2 Specifications

General

Brand	Dahua
Model	NVR4204-P-4KS2
Category	DVR
Language	English