He asked an agent what beeped in his house, and it found the smoke alarm
Someone in the house heard a beep a little before 12:13 AM. He handed the question to an agent with access to the camera recorder. It came back with the sound, the source and a short list of reasons: a smoke alarm that sounded once, at 3417 Hz for 0.87 seconds, about two metres from one camera. It was not a fire, not carbon monoxide and not a dying battery.
How it works
- He asks the agent what beeped
- Agent searches the camera recorder audio
- It pinpoints one smoke alarm sound at 00:11:05 and rules out fire, carbon monoxide and a low battery
Why it’s worth knowing
The agent measured the beep at 3417 Hz for 0.87 seconds and placed it about two metres from a camera.
Where it’s from
Summarized from a public post on njump.me. See the original ↗