Gunshot detection through the microphones your cameras already have — no dedicated acoustic sensors to buy or wire. A shot raises an alert in seconds, one click from the exact moment of footage, and the system automatically preserves an evidence clip before anyone has to think to save it.
The hardest problem in gunshot detection isn't hearing a bang — it's not crying wolf at every firework and slammed door. Nevtech runs a two-stage acoustic model: a broad screen finds impulse sounds, then a classifier trained on four classes makes the call.
The classifier explicitly learns what gunfire is not — fireworks, backfires, dropped pallets — instead of alerting on anything loud. Fireworks get their own score precisely because they're the classic false alarm.
Enable audio detection per camera — the parking structure, the perimeter, the lobby. The camera's microphone must be on; nothing else changes about the camera.
Detections below the confidence floor are dropped — checked at the sensor and re-checked at the server, so a misconfigured worker can't flood your alerts with maybes.
A detection isn't a row in a report you read tomorrow. It's a live alert with the camera's name on it, a persistent entry in the alerts feed — and a direct link that opens playback at the exact second of the sound.
Operators watching the console see the alert as it happens; everyone else finds it in the alerts feed, filterable by day, type, and camera — every filter a shareable link.
Every detection automatically cuts a clip — 15 seconds before the sound through 30 seconds after — and keeps it for 90 days, independent of the footage window. The evidence exists even if nobody touches the system that night.
Gunshot alerts follow camera access: a site-restricted operator gets that site's alerts, nothing else. Alerts about cameras you can't watch don't exist for you.
We say this on the settings screen and we'll say it here: acoustic detection can false-alarm — fireworks are the classic case — and no microphone hears everything. The alert says "possible gunshot" because that's what it is: a reason for a human to look at the footage right now, one click away. Vendors that promise certainty are selling you a lawsuit.
We'll demo the full loop — detection, alert, footage, evidence clip — and show you the honest failure cases too.
Book a demoAcoustic gunshot detection is an operator aid, not a life-safety system, an alarm service, or a substitute for emergency dispatch. Detection performance depends on microphone quality, placement, distance, and acoustic environment, and false positives (notably fireworks) and missed detections can occur. Alerts should be verified against footage before action is taken.