A phone is charging ...by speaking

What's more frustrating than the battery which is found in flat after 2 hours of conversation with his girlfriend or his banker ... and always when it should not!

Well here is the solution: a phone that is recharged through the voice!

How ?

South Korean engineers have developed a new technology that turns sound into electricity. The mobile phone is then supplied user speaks while his .. Says .. Says .. and the more you talk the more you recharge!
It may, in addition, to the delight of telephone operators!

Dr. Dr. Sang-Woo Kim, who was behind the project said:

The sound that exists in our daily lives and the environment has been neglected as a source of energy. It is this idea that motivated us to develop a production of electricity using sound energy speech but also music or noise in general , tells The Telegraph

For electronics enthusiasts, the principle is simple! The device uses tiny son of zinc oxide sandwiched between two electrodes, vibrating, generate an electrical current. And voila!

Well, just a few improvements as currently get 50 millivolts of electricity, almost required to recharge a phone, you need a sound ... 100 decibels, the equivalent noise of a noisy road!
Already people shouting in their mobile phone ... it may be hell, However, there could be a downside to the innovation, if it gives people a new reason to shout into their phones as they attempt to squeeze in every extra bit of power they can!