Manual

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Firmware User’s Manual V7.00.44
85
Sound Detection
Sound detection is available on cameras with Audio in capability and is shown on the user
interface only if the Audio In function is enabled in Audio setup menu (see Audio on page 79) .
Sound detection is used to trigger the camera or another camera to perform specific actions or a
digital output device, such as alarms or lights, etc. to respond.
Check the Enabled box to enable Sound Detection.
The Trigger Interval refers to the time interval of the first detected sound to the next detected
sound. For example, if trigger interval is set at 5 (seconds), the next sound detection is triggered
only after 5 seconds. If the next sound is detected 3 seconds after the first sound, the trigger is
not activated.
To set the range or loudness of sound, set the Trigger Threshold. This helps define which sound
is considered loud enough to be a trigger. For example, the sound of blowing wind should not be
considered, while the sound of a door creaking is a cause for alarm. The red line on the Activity
graph shows the threshold set at 15%. The blue graph shows the sound activity. If the blue graph
exceeds the red line, sound is triggered.
How to choose the most optimal trigger threshold level? The rule of thumb, keep the trigger
threshold as small as possible while not causing false alarms.
After changing any of the items above, press Apply to save the changes.