How cochlear implants work

How cochlear implants work

A cochlear implant uses a sound processor that you wear behind your ear. A transmitter sends sound signals to a receiver and stimulator implanted under the skin, which stimulate the auditory nerve with electrodes that have been threaded into the cochlea. Some types of cochlear implants have one external unit that has a speech processor, microphone and transmitter combined (lower left), while others have these as separate external parts (upper left and on right).