Build a spy microphone
How to build a spy microphone This how-to video shows a way to build a parabolic microphone capable of picking up sound at long distances. Use it for hearing far away sounds or to spy on people. All you need to replicate this hack at home is a wok lid or metal mixing bowl, a condenser microphone, a dowel rod, a washer, super glue, and shrink tubing. Watch this hacking tutorial and learn how to build a super powerful microphone.
