Learn about Hearing and the Ear in this educational video from dizzo95.
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Male Speaker: Sound is pressure waves moving through air and must go through three different areas of the ear before it's converted into nerve impulses for the brain. The pinna of the outer ear receives the sound waves, which then travel through the auditory canal to the middle ear as these waves at the eardrum they cause it to vibrate. To make sure that the air pressure is equal in the middle ear air comes from a mouth the eustachian tube, the vibrations from the eardrum are then transmitted to three tiny bones the hammer, the anvil and the stirrup which extend from the are drum to the inner ear were the auditory nerve release these vibrations as impulses to the brain.