Dictionary of Human Evolution and Biology

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Tympanic Membrane

Thin membrane that covers the auditory canal where it separates the external ear from the middle ear. The tympanic membrane vibrates when sound waves impinge upon it and this vibration is transmitted to the auditory ossicles. One of these tiny bones, the malleus, is attached to the tympanic membrane. Aka tympanum, eardrum.

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From "Dictionary of Nursing and Individual Health Care"