Using High Speed Video to make a Mic

[ukgimp]

https://youtu.be/FKXOucXB4a8

"High speed cameras can decode the slight vibrations of objects in videos to recover audio. Even through sound proof glass."

[ergophobe]

Interesting. I guess it's another case of a type of sensor that is becoming democratized

Remember how the Soviets used IR detecting vibrations to eavsedrop on the US embassy since the 1940s
https://en.wikipedia.org/wiki/Laser_microphone