The inner ear is invisible from outside your body, but its role in hearing is critical. This is where cells and nerves process sound and send it to the brain. A lot of age-related hearing loss takes place in the inner ear, because these important cells and nerves deteriorate with age. The inner ear also helps us keep our balance.
The cochlea’s hair cells convert sound into electrical signals. Those electrical signals are transmitted via neurotransmitters along the auditory nerve to the brain, which can then analyze what you are hearing.