3 ms·
The police keep track of this, and it can be used to validate audio recording evidence. https://en.wikipedia.org/wiki/Electrical_network_frequency_analysis htt
by 127361 3y ago
The police keep track of this, and it can be used to validate audio recording evidence.
https://en.wikipedia.org/wiki/Electrical_network_frequency_analysis https://en.wikipedia.org/wiki/Electrical_network_frequency_a...
- toomuchtodo 3y agohttps://news.ycombinator.com/item?id=38161677 https://news.ycombinator.com/item?id=38161677 https://datethis.app/ https://datethis.app/