Ear Digram

The Pinna or the outer ear, funnels sound vibrations into the ear canal. The sound waves hit the Ear Drum, a membrane (thin layer of skin) at the end of the ear canal, which vibrates. The vibrations move the Ossicles, three small bones that make that make the sound louder. They send sound waves to the cochlea. The Cochlea is filled with fluid, which ripples with the sound waves and moves tiny hair shaped cells called cilia. Cilia transform the vibrations into electrical impulses. The Auditory Nerve send these impulses to the brain, which translates the signals into the sounds you hear.