A cochlear implant is an electronic device that is implanted during surgery. It helps provide hearing to people who have a certain type of hearing loss. This type of hearing loss is usually caused by damage or a defect in the inner ear. The implants can directly stimulate the auditory nerve to send information to the brain.
Cochlear implants have three parts:
- Speech processor—The speech processor looks like a long, narrow calculator. It is worn behind the ear or on a belt. It increases sound, converts it into digital signals, and sends these signals to the transmitter.
- Transmitter—The transmitter is a headphone that is worn behind the ear. It receives electrical signals from the speech processor and sends them through the skin to the receiver.
- Receiver—The receiver is the part that is implanted. It is a magnetic disk about the size of a quarter. It is placed under the skin behind one ear. A wire that runs from the receiver to an electrode is placed in the inner ear, where it stimulates the acoustic nerve.
Copyright © Nucleus Medical Media, Inc.
Last reviewedJuly 2013by Kari Kassir, MD; Michael Woods, MD
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