Science Challenge:
Design a small device to harvest sound energy and put it back into the system to make things more efficient.
If this can not be done explain why.
"“There is definitely energy contained in that sound,” says David Cohen-Tanugi, vice president of the MIT Energy Club and a John S. Hennessy Fellow in MIT’s Materials Science and Engineering department . “But the density of the energy is very low, and there is no way to capture it all. You’d have to have obscenely loud, continuous noise for harvesting to be worthwhile.”"
Can noise be concentrated into a smaller space? Also could noise be reduced through a new low friction material.
Here is a good explanation also look at related questions.
http://engineering.mit.edu/ask/can-sound-be-converted-useful-energy
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