MIT creates biobattery that could allow the human ear to power its own hearing aid

By John Hewitt Energy harvesting has now reached the human ear. The cochlear implant, though hugely successful, requires a bulky external system to deliver both wireless power and the recorded sound signal to the internal stimulator. An intriguing enhancement would be to develop systems so efficient that all the power necessary for reception of a signal is administered through the signal transmission itself. In other words the charging current is modulated with the signal so that a separate channel becomes superfluous. Read more here: http://www.extremetech.com/electronics/139875-mit-devises-biobattery-that-could-allow-the-human-ear-to-power-its-own-hearing-aid