How Do We Hear ?

How Do We Hear ?

The ear can be divided into three parts: 1) the external ear includes the pinna (outer, visible ear) and the ear canal, 2) the middle ear includes the tympanic membrane (ear drum) and the ossicles (middle ear bones), 3) the inner ear, which includes the cochlea (organ of hearing) and vestibule (organ of balance).

Sound waves enter the ear canal and cause a vibration of the tympanic membrane (ear drum) which is then passed through three tiny bones behind the ear drum in the middle ear space: the malleus (hammer), incus (anvil) and stapes (stirrup). The sound vibrations in the ossicles are then transmitted to the nerves and fluids in the cochlea (inner ear), which generates a nerve impulse that passes along the auditory nerve to the brain.

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