NVR User Manual 061220NA 113
Figure 160, Set Audio Exception Detection Rules
1) Check the Audio Input Exception checkbox to enable the audio loss detection function.
2) Check the Sudden Increase of Sound Intensity Detection checkbox to detect a steep rise in sound
in the surveillance scene. You can set the detection sensitivity and threshold.
• Sensitivity: Range [1−100], the smaller the value, the more severe the change must 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. Adjust it according to the real
environment.
3) Check the Sudden Decrease of Sound Intensity Detection checkbox to detect a steep drop in sound
in the surveillance scene. You can set the detection sensitivity [1−100].
7. Click Apply to activate the settings.
9.9 Sudden Scene Change Detection
Purpose
Scene Change Detection detects the change of surveillance environment affected by external factors
such as intentional camera rotation, and certain actions can be taken when the alarm is triggered.
NOTE: Refer to
Face Detection
for operating steps to configure the scene change detection.
The Sensitivity in the Rule Settings ranges from 1 to 100, and the higher the value, the
more easily the change of scene can trigger the alarm.
9.10 Defocus Detection
Purpose
Image blur caused by lens defocus can be detected, and certain actions can be taken when the alarm is
triggered.
NOTE: Refer to the
Face Detection
for operating steps to configure the defocus detection.
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