Cochlear implant with no exterior hardware can be wirelessly recharged
Cochlear implants -- medical devices that electrically stimulate the auditory nerve -- have granted at least limited hearing to hundreds of thousands of people worldwide who otherwise would be totally deaf. Existing versions of the device, however, require that a disk-shaped transmitter about an inch in diameter be affixed to the skull, with a wire snaking down to a joint microphone and power source that looks like an oversized hearing aid around the patient's ear. Researchers have now developed a new, low-power signal-processing chip that could lead to a cochlear implant that requires no external hardware.
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