How the ear works
- Any source of sound sends vibrations or sound waves into the air.
- These funnel through the ear opening, down the external ear canal, and strike your eardrum, causing it to vibrate.
- The vibrations are passed to the three small bones of the middle ear, which transmit them to the cochlea.
- The cochlea contains tubes filled with fluid. Inside one of the tubes, tiny hair cells pick up the vibrations and convert them into nerve impulses.
- These impulses are delivered to the brain via the hearing nerve.
- The brain interprets the impulses as sound (music, voice, a car horn, etc.).