Cochlea: The cochlea is a spiral-shaped structure in the inner ear responsible for converting sound vibrations into electrical signals that can be interpreted by the brain.
Ossicles: The ossicles are three tiny bones (malleus, incus, and stapes) in the middle ear that amplify sound vibrations from the eardrum to the inner ear.
Eustachian tube: The Eustachian tube connects the middle ear to the back of the throat and helps equalize air pressure between the middle ear and outside environment.