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Comment by amelius | Hacker News Reader
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amelius
·
Every capacitor can be a potential microphone ...
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srean
·
Make that "every vibrating surface can be a potential microphone ..."
devmor
·
The laser on a hotel window experiment comes to mind.
srean
·
Or an adapted Theremin
https://en.wikipedia.org/wiki/The_Thing_(listening_device)
spyder
·
with a high speed camera any vibrating reflective object like a potato chips bag can become a weak microphone if you have line of sight even behind a soundproof window:
https://www.youtube.com/watch?v=FKXOucXB4a8
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