September 30, 2016

Hearing

There are three sections of the ear: the outer ear, middle ear and inner ear. Each part helps move sound to the inner ear where it is ultimately processed by the brain. When a sound occurs, the vibrations are channeled through the ear canal to the eardrum. The eardrum vibrates and causes the three bones inside the middle ear (malleus, incus, stapes) to move. The mechanical vibrations are sent to the inner ear hearing organ (cochlea), where it makes tiny little hairs move in a fluid. These hairs convert the movement to auditory signals, which are then transmitted along the auditory nerve to the brain for sound processing.

Graphic of the parts of the ear showing how we hear