Who needs microphones when you have cameras?

Originally shared by Winchell Chung

Article from 2014

The team’s processing algorithm lets them take a new tack: a completely passive recovery of the sound. By recording objects’ movements on high-frame-rate video, in ambient lighting—no laser needed—they are able to translate the vibrations caused by speech and music back to sound waves, with only a little bit of noise.

https://spectrum.ieee.org/tech-talk/consumer-electronics/audiovideo/your-candy-wrappers-are-listening