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Re: Sound bug



The difference with this one is that it contains something the US government
uses in sonar systems that puts out stronger pulses.(did not copy article
but recall something like 400 lb/in^2)






I remember seeing these devices in Edmund Scientific when I was still a
kid. How is this one different?

Try gluing a supermagnet to a sound board. Then drive a small coil with
a music signal, and when you wave the coil near the magnet, guess what
happens?

Then try biting the supermagnet between your molars, and wave the coil
near your face.


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