A sound energy solution ?

the problem with the ricer car is it is taking energy to produce the sound. But i have no idea if you could actually use some other source to somehow create energy, thats a pretty interesting idea.

i feel that if people did more things to conserve energy we would have less of an energy issue. Simple things, like turning lights off, and appliances, not using air conditioners, or heating your house as much in winter. And obviously our hobby falls into the "wasted" energy category for the most part. So i try to do some of the other things to offset my car and water skiing hobbies.