Cochlear implants use a sound processor that fits behind the ear. The processor captures sound signals and sends them to a receiver implanted under the skin behind the ear. The receiver sends the signals to electrodes implanted in the snail-shaped inner ear (cochlea).
If a person has severe hearing loss, a cochlear implant may help. A cochlear implant is different from a hearing aid. A hearing aid makes sounds louder. It has the most benefit for a person who has some hearing loss. But a cochlear implant can help a person with very little or no hearing.