Hula Mic Instructable

Here is a wacky, simple project from Zeppelin Design Labs: Convert a hula hoop, a clock and a contact microphone into this crazy vocal mic. Now, a contact mic only responds to vibrations inside solid objects, and not to air pressure as condenser and dynamic mics do – and would therefore be pretty useless as a vocal mic. But by sticking the piezo-electric sensor to an object that does respond to air pressure, you can sing through all sorts of unusual odds and ends. We suspended the clear plastic lens of a ch