Turning Sound Into a Laser

Using non-linear acoustics, I'm able to focus audible sound like a laser. I go over some basic principals of operation, how I designed the circuit, and how you can build your own. Circuit Diagram at 1:18 Wikipedia Article: https://en.wikipedia.org/wiki/Sound_from_ultrasound Music: Ice Dream - By "The Hikers" https://www.youtube.com/channel/UCRaewGD5PbSckJqAcURNPVA