3 ms·
They can just listen to the 50hz ground hum in the signal coming from his audio equipment and determine which relay stations are providing that power ..
by fit2rule 7y ago
They can just listen to the 50hz ground hum in the signal coming from his audio equipment and determine which relay stations are providing that power ..
- brokenmachine 7y ago?how? 50Hz is 50Hz everywhere.
- Ao7bei3s 7y agoIt's never exactly 50 Hz, as the frequency is affected by load and generators can't compensate this perfectly. So record it in many locations, then correlate the signal extracted from audio/video against the database. Main article: https://en.wikipedia.org/wiki/Electrical_network_frequency_analysis https://en.wikipedia.org/wiki/Electrical_network_frequency_a...