No, it's not a new idea. It's just being newly applied. I like this use of piezoelectric devices to turn heat into sound into energy: http://www.unews.utah.ed

No, it's not a new idea. It's just being newly applied. I like this use of piezoelectric devices to turn heat into sound into energy: http://www.unews.utah.edu/old/p/053007-1.html http://www.unews.utah.edu/old/p/053007-1.html