There are three types of hearing loss conductive hearing loss, sensorineural hearing loss and mixed hearing loss. Cochlear implant is beneficial in who has profound sensorineural hearing loss in both ear. A cochlear implant is an electronic device which is surgically implanted that provides a sense of sound to a person who has severe to profound sensorineural hearing loss. Cochlear implants may provide hearing in patients who are deaf because of damage to sensory hair cells in their cochleas. In those patients the implants can enable sufficient hearing for better understanding of speech. Patients are able to hear and understand speech and environmental sounds. Newer devices and processing-strategies allow patient to hear better in noise, also
