See Otolithic Crisis of Tumarkin.

Referring to the eardrum or the cavity of the middle ear.

The eardrum. It separates the outer ear from the middle ear and is conducts sound to the middle ear. More technically, the eardrum is a  thin, taut, concave, pearly-white membrane that covers the entrance to the middle ear. It vibrates in response to incoming sounds, which are then transmitted to the middle and inner ear.

A measure of the mobility of the eardrum. A tympanogram is a graph that shows how well the middle ear pressure regulating system is working, whether the eardrum is intact and how well it moves. It can be used to identify middle ear disorders that require medical attention.

Instrument used to screen for middle-ear disorders such as otitis media.

A test, using a tympanometer, that checks the function of the eardrum and middle ear by measuring whether the eardrum moves normally when varying amounts of air pressure are applied to the ear.