HackerTube / Video
The hidden background noise that can catch criminals
Tom Scott
Tom Scott explains Electrical Network Frequency analysis, where hum from the power grid in a recording is matched against grid logs to date and place it. He talks to a researcher and sets them a challenge.
The go-to short, accessible explainer for mains hum forensics, linked whenever recording authenticity or timestamps come up.
8 Hacker News mentions · 2022–2025