Surgery to repair or replace a damaged eardrum.

see Pressure Equalization Tube.

The middle ear cavity.

See UnComfortable Loudness level.

The volume at which sounds become uncomfortably loud. Any further increase in volume would hurt.

Hearing loss in one ear only. Unilateral hearing loss adversely affects the educational process in a significant percentage of students who have it, even though they have normal hearing in their other ear.