There was a great talk on Ted by Michael Rubinstein, with cameras they are able to extract audio from objects (visually) and they are able to detect the tiniest

There was a great talk on Ted by Michael Rubinstein, with cameras they are able to extract audio from objects (visually) and they are able to detect the tiniest motions on magnify them, definitely worth watching: https://www.ted.com/talks/michael_rubinstein_see_invisible_motion_hear_silent_sounds_cool_creepy_we_can_t_decide?language=en#t-588554 https://www.ted.com/talks/michael_rubinstein_see_invisible_m...