When the sound waves reach the ________, it starts vibrating :

Pinna

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Stir rup

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Tympanic membrane

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None of these

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Solution

The correct option is C Tympanic membrane
The tympanic membrane is also called the eardrum. When the sound waves strike the eardrum or tympanic membrane it starts vibrating. Sound from the outside world is collected by the pinna and reaches the eardrum through the auditory canal.

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