|Photo: Berit Engström
Hair cells in a normal ear without hearing loss. These fine hairs are set in motion due to the incoming sound. The higher the level of the sound, the more the hairs move. Via the hair cells movement, sound waves are converted to nerve impulses, which are sent to the brain.
||Photo: Berit Engström
Hair cells in an ear with a hearing loss. After a high noise exposure the hair cells become destroyed. These few remaining hairs are only slightly able to convert the sound signals into nerve impulses - a permanent hearing loss is inflicted.