The ear consists of three sections the outer ear, the middle ear and the inner ear. All three sections work together to deliver sound to the brain. In normal hearing, the outer ear picks up sound, which it sends in waves down the ear canal to the eardrum. These sound waves strike the eardrum and cause it to vibrate, sending the bones in the inner ear into motion. Fluid in the inner ear, or cochlea, then transfers this motion to tiny hair cells. The hair cells absorb the movement, creating electrical impulses which are sent to the brain via the hearing nerve. This translates into sound you hear.