As sound passes through each ear, it sets off a
chain reaction that could be compared to the toppling of a row of
dominoes. First, the outer ear collects pressure (or sound) waves,
and funnels them through the ear canal. These vibrations strike
the eardrum, and then the delicate bones of the middle ear conduct
the vibrations to the fluid in the inner ear. This stimulates the
tiny verve endings, called hair cells, which transform the
vibrations into electro-chemical impulses. The impulses travel to
the brain where they are deciphered into sound you recognize.
