ISSUE 1.09-12 VCA Alarm5a. Check the Audio Input Exception checkbox to enable the audio loss detectionfunction.5b. Check the Sudden Increase of Sound Intensity Detection checkbox to detectthe sound steep rise in the surveillance scene. You can set the detectionsensitivity and threshold for sound steep rise.Sensitivity: Range [1-100] The smaller the value, the more severe the changeshould be to trigger the detection.Sound Intensity Threshold: Range [1-100] It filters the sound in theenvironment; the louder the environment sound, the higher the value should beset. You can adjust it according to the real environment.5c. Check the Sudden Decrease of Sound Intensity Detection checkbox to detectthe sound steep drop in the surveillance scene. You can set the detectionsensitivity[1-100] for sound steep drop.6. Click Apply to activate the settings.SECTION 15 SUDDEN S CENE C HANGE D ETECTIONThe scene change detection function detects the change of surveillance environmentaffected by the external factors; such as the intentional rotation of the camera. Whenthe alarm is triggered, certain actions can be taken.Refer to Section 3 Face Detection on page 9-2 for operating steps to configure thescene 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.SECTION 16 D EFOCUS D ETECTIONThe image blur caused by defocus of the lens can be detected and some certainactions can be taken when the alarm is triggered.Refer to Section 3 Face Detection on page 9-2 for operating steps to configure thedefocus 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.
