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Cochlear implantation is a procedure for the treatment of severe to profound sensorineural hearing loss (SNHL) in both children and adults. A cochlear implant is a device inserted into your ear to help in hearing. Although it cannot restore hearing completely, it does restore the sensation of sound. It works by stimulating the auditory nerve, the nerve that carries sound impulses to the brain. Cochlear implants are indicated for the profoundly or totally deaf, who have either been born deaf or have lost hearing later in life.