Sound Waves Could Power Cell Phone?

Sound Waves Could Power Cell Phone?.Cell phones are only useful so long as they have charge left in the battery, may not be an obvious comment to make when looking at the future as to how cell phones may be powered. Pioneering work, by Professor Tahir Cagin at the Artie McFerrin Department of Chemical Engineering at Texas A&M University, in the area of 'sounds waves' to help cell phones generate