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The part of the ear where sound wave compressions and rarefactions cause the eardrum to vibrate is the A. outer ear. B. inner ear. C. auditory nerve. D. middle ear.
The answer is C -- the middle ear. The outer ear focuses sound waves, but the middle ear is the part that causes the eardrum to vibrate. [ The inner ear and 8th nerve are involved in turning mechanical energy into electrical energy (for things like pitch discrimination). ]
Expert answered|t3A|Points 246|
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