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Where is the tympanic membrane located in the ear?

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Cross-section diagram of the human ear showing the outer ear, middle ear, and inner ear, with labeled parts including the auricle, auditory canal, tympanic membrane, ossicles, cochlea, semicircular canals, and nerves. — human ear Structure of the human ear.

The tympanic membrane, also known as the eardrum, is located at the end of the external auditory canal, where it serves as the boundary between the outer ear and the middle ear.12

It is stretched obliquely across the end of the external canal and forms the outer (lateral) wall of the middle-ear cavity. The membrane is held in place by the tympanic annulus, an incomplete ring of bone.23