Final answer:
The tympanic membrane in the outer ear transmits sound by vibrating through the ossicles in the middle ear.
Explanation:
The part of the outer ear that transmits sound by vibrating is the tympanic membrane, also known as the eardrum. The tympanic membrane is connected to the malleus, incus, and stapes, which are the three ossicles in the middle ear responsible for transferring energy from the eardrum to the inner ear for sound transduction.
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