What is an acoustic charger?
Scientists at the university of Houston have come up with a new way to charge a mobile phone. Sound wave chargerThe principle is not complicated. Like the "power road", it USES the piezoelectric effect. To be able to convert the faint vibrations of sound waves into energy, the piezoelectric crystals would have to be tiny, about 23 nanometers in size (a human hair is about 100, 000 nanometers in diameter). Sound wave chargerThe technology could be ready within a few years. By then, you'll be able to charge your phone while talking on the phone without the need for additional charging devices.