Audio detection

Audio detection listens to a camera's audio for specific sounds, such as glass breaking, an alarm, or a dog barking. It runs alongside video detection and can trigger events and notifications on its own. The camera needs to provide an audio stream.

Setup

Enable the audio plugin for a camera in Settings → Plugins (see Set up sensors). The plugin has no settings of its own: it listens for the standard sound list and takes its confidence from the camera.

The sounds it recognizes are glass breaking, screaming, gunshots, alarms (smoke, car, siren), a doorbell, knocking, a dog bark, a cat, a baby crying, and speech.

Settings on the camera

Audio detection is tuned in Settings → Detection, per camera:

• Min. volume (dBFS). Audio frames below this level are skipped. Ranges from -100 (silence) to 0 (maximum), default -40.
• Audio confidence. Sounds the detector is less sure about than this are dropped (0 to 1, default 0.7).
• Audio timeout. How long an audio event stays active after the last trigger (minimum 10 seconds).