What is the eardrum?

David M. Vernick, MD
Ear, Nose & Throat (Otolaryngology)
The eardrum, or tympanic membrane, is a slender skin-like structure about a half-inch across and about the width of a strand of hair. Although small and slender, the eardrum is a tight barrier that separates the outer ear from the middle ear, a peanut-sized chamber in the skull that's filled with air.

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