Acoustic Monitoring
Definition
Continuous recording of environmental sound to detect specific sound events, such as gunshots, chainsaws, or vehicle engines, that indicate illegal activity. Machine-learning classifiers process the audio stream and generate alerts when trigger sounds are detected.
- Input
- Continuous environmental sound recording
- Detects
- Gunshots, chainsaws, vehicle engines
- Processing
- Machine-learning classifiers
- Output
- Alerts on trigger sound detection
- Application
- Illegal activity, e.g. poaching, illegal logging
Common questions
How does an acoustic monitoring system distinguish a gunshot from other loud sounds?+
Classifiers are trained on labelled audio samples of the target sound types, and they compare the acoustic signature of a detected event, its frequency profile, waveform shape, and duration, against those trained patterns before raising an alert.
What are the limits of acoustic monitoring as evidence of an event?+
An alert indicates a sound consistent with the trigger class occurred near a sensor at a given time; it does not by itself identify who caused the sound or confirm the exact location, so it typically prompts a physical follow-up.
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