Sound waves enter your ear canal and hit
your ear drum.
This makes the ear drum vibrate.
Three tiny bones in your middle ear link the
vibrating ear drum with the inner part of
The 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
Your cochlea is filled with a liquid that
carries the vibrations to thousands of tiny
Each cell is tuned to a particular sound (or
As 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.