May 30, 2013

How the ear works


The human ear has three main parts - the outer, middle and inner ear. The outer ear is like a funnel collecting sounds from the air. It leads to a tube, the ear canal, which ends in a flexible, circular eardrum. Sounds make the eardrum vibrate and this, in turn, makes three small bones in the middle ear vibrate too. The bones pass the sound vibrations to the cochlea in the inner ear, where they are changed into nerve signals that go to the brain. (World of Science)