Digital Video Recorder User Manual
141
Figure 9-11 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.
Step 6 Click Apply to activate the settings.
9.14 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.
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