It is a small and very complex electronic device which can help to provide a "sense of sound" to a deaf person. It is surgically placed under the skin in an invasive operation. It also has an external part that sits behind the ear. This device will not restore normal hearong, it gives a person representation of sounds in the environment and may help a person understand speech. Results so vary and it does not make a person hearing, they may be able to hear distorted sounds.
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