picks up the sound
The eardrum receives the vibrations of the air.
A spiral-shaped cavity of the inner ear that resembles a snail shell and contains nerve endings essential for hearing
Sound is a wave that vibrates the eardrum (tympanic membrane) this vibration moves tiny bones (malleus, incus,stapes) that magnify and transmit the vibration to the oval window of the choclea. Inside the chochlea are tiny hair cells that when bent by the vibrations send an impulse to the brain.