alt Hacker NewsIm not sure I got it. It generates acoustic signals and a microphone server picks them up.
If so, will it penetrate through walls?
Replies
croes • today at 9:04 AM
Unlikely because it’s ultrasonic sound, at least if you have brick walls.
Could work for drywalls
Well, idk if these do but you can certainly make passive devices that penetrate walls.
See http://en.wikipedia.org/wiki/The_Thing_(listening_device)