A cochlear implant is a medical device designed to provide a sense of sound to individuals with severe hearing loss or deafness. Unlike hearing aids, which amplify sound, cochlear implants bypass damaged parts of the ear and directly stimulate the auditory nerve. This allows the brain to perceive sound, enabling users to hear speech and environmental sounds. The device consists of two main components: an external processor worn behind the ear and an internal implant surgically placed under the skin. The external processor captures sound, converts it into digital signals, and sends them to the internal implant, which then stimulates the auditory nerve.