Audition (Hearing)
lSound waves enter your ear canal and hit your ear drum.
lThis makes the ear drum vibrate.
lThree tiny bones in your middle ear link the vibrating ear drum with the inner part of your ear.
lThe last of these bones is connected to a tiny bone structure that looks a bit like a snail shell, but is about the size of a pea. It is called the cochlea (pronounced cock-lee-ah).
lYour cochlea is filled with a liquid that carries the vibrations to thousands of tiny hair cells.
lEach cell is tuned to a particular sound (or frequency).
lAs these little hair cells move in the fluid, they carry a message to the nerve that is connected to your brain, which turns this signal into what you hear.
