Digital Video Recorder User Manual
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Figure 10. 10 Set Audio Exception Detection Rules
1) Check the checkbox of Audio Loss Exception to enable the audio loss detection function.
2) Check the checkbox of Sudden Increase of Sound Intensity Detection to detect the sound steep rise in
the surveillance scene. You can set the detection sensitivity and threshold for sound steep rise.
Sensitivity: Range [1-100], the smaller the value is, the more severe the change should be to trigger the
detection.
Sound Intensity Threshold: Range [1-100], it can filter the sound in the environment, the louder the
environment sound, the higher the value should be. You can adjust it according to the real environment.
3) Check the checkbox of Sudden Decrease of Sound Intensity Detection to detect the sound steep drop
in the surveillance scene. You can set the detection sensitivity [1-100] for sound steep drop.
6. Click Apply to activate the settings.
10.14 Defocus Detection
Purpose:
The image blur caused by defocus of the lens can be detected, and some certain actions can be taken when the
alarm is triggered.
Please refer to the Chapter 9.1 Face Detection for operating steps to configure the defocus detection.
The Sensitivity in the Rule Settings ranges from 1 to 100, and the higher the value is, the more easily the
defocus image can trigger the alarm.
10.15 PIR Alarm
Purpose:
A PIR (Passive Infrared) alarm is triggered when an intruder moves within the detector's field of view. The heat
energy dissipated by a person, or any other warm blooded creature such as dogs, cats, etc., can be detected.
Steps:
1. Enter the VCA settings interface.
Menu> Camera> VCA
2. Select the camera to configure the VCA.
You can click the checkbox of Save VCA Picture to save the captured pictures of VCA detection.
3. Select the VCA detection type to PIR Alarm.
4. Click to configure the trigger channel, arming schedule and linkage action for the PIR alarm.
5. Click the Rule Settings button to set the rules. Please refer to the Chapter 9.1 Face Detection for
instructions.
6. Click Apply to activate the settings.
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