27 days ago14 points(+0/-0/+14Score on mirror)1 child
It's been a thing for a few decades. Bounce a laser outside the visible spectrum off glass, measure deviations in the reflection caused by vibration of window, reproduce the sounds that caused said vibration.
27 days ago6 points(+0/-0/+6Score on mirror)1 child
I used to be a private investigator. I remember first hearing about that in 2000. Saw it for the first time from a an FBI guy I met a couple years later. It's been a round for a long time.