3 ms·

See also the https://en.wikipedia.org/wiki/Laser_microphone https://en.wikipedia.org/wiki/Laser_microphone , invented by Léon "Theremin" Theremin for Soviet esp

by leoc 9y ago

See also the https://en.wikipedia.org/wiki/Laser_microphone https://en.wikipedia.org/wiki/Laser_microphone , invented by Léon "Theremin" Theremin for Soviet espionage.