3 ms·
At least within the house - we moved around a lot, but I lived in a few three storey stonework houses, and could generally tell from 'the other end' of the hous
by detritus 5y ago
At least within the house - we moved around a lot, but I lived in a few three storey stonework houses, and could generally tell from 'the other end' of the house if the TV was on.
I don't recall hearing the same noise from fridges though!
- aaaaaaaaaaab 5y agoIt only works with CRT TVs though. It's a 15khz tone, due to magnetostriction in the flyback transformer: https://en.wikipedia.org/wiki/Flyback_transformer https://en.wikipedia.org/wiki/Flyback_transformer