What is a thin membrane stretched tight across the end of the ear canal that vibrates when sound waves strike it?

What is a thin membrane stretched tight across the end of the ear canal that vibrates when sound waves strike it?

  • Correct Answer: auricle
  • earlobe
  • cerebrum
  • eardrum

Explanation: The eardrum is like the head of a drum. It’s a thin membrane stretched tight across the end of the ear canal. The eardrum vibrates when sound waves strike it, and it sends the vibrations on to the middle ear.

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