Cochlear implants (CI) are surgically implanted electronic devices that enable individuals who are profoundly deaf to hear. It should be pointed out that a surgically implanted device does not provide a sense of sound totally . It does allow the deaf to recognize sounds and help to understand speech. However, after placing a cochlear implant the quality of sound is different from natural hearing and takes time to learn and recognize the memory signs. The article consists of preliminary diagnosis and stages of patient rehabilitation before and after placing CI.
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