Cochlear implant
A cochlear implant (CI) is an electronic device that is inserted by surgery into a part of the ear called cochlea. Persons who are having difficulty in hearing or are completely deaf use the device to help them hear better. Not all parts of the cochlear implants are inside the ear. They have a microphone and some electronics that are usually placed behind the ear. These electronics send signals to the device implanted in the ear to make hearing possible.