What is the eardrum?

The eardrum is a translucent partition tissue located between the external auditory canal and the middle ear.

The eardrum is an oval-shaped, translucent structure situated between the external auditory canal and the tympanic cavity of the middle ear. It has both lateral and medial surfaces, which ensure adequate blood and oxygen supply. The lateral surface receives blood supply from the deep auricular artery, while the medial surface is supplied by the anterior and posterior tympanic arteries.

The primary functions of the eardrum include detecting sound waves as vibrations and converting these vibrations into neural electrical signals that transmit sound to higher centers in the brain. Additionally, it serves to protect the middle ear from bacteria, water, and foreign objects. Clinically, conditions affecting the eardrum may include barotrauma, otitis media, and traumatic eardrum perforation.