A hearing aid amplifies the sounds going into the ear. They are most often prescribed for people who have a type of hearing loss known as “sensorineural,” meaning that some of the tiny hair cells of the inner ear are damaged. The surviving healthy hair cells pick up the sound delivered by the hearing aid and send them as neural signals to the brain via the auditory nerve.
For people with mild-to-moderate hearing loss, standard hearing aids work best. “Power” models are often used for people who have severe to profound loss