The Eardrum (Tympanic Membrane): This thin membrane stretches across the ear canal and vibrates immediately when struck by sound waves.
Ossicles: These three tiny bones in the middle ear—the malleus (hammer), incus (anvil), and stapes (stirrup)—pick up the vibrations from the eardrum and pass them along.
Oval Window: A thin membrane that receives vibrations from the stapes to move fluid in the inner ear.