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Question

The vibrations of the tympanic membrane are amplified approximately ............... times in the oval window.

A
5
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B
20
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C
40
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D
55
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Solution

The correct option is B 20
The ear ossicles cause the oval window to vibrate; this is a small membrane-covered opening directly below the stapes. Since the ear ossicles amplify the vibrations of the tympanic membrane and since the oval window is much smaller than this membrane, the waves are amplified 15 to 20 times their original amount.

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