The eardrum is so sensitive that it can respond to the movement of a single molecule.

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The eardrum is an incredibly sensitive membrane that can detect even the smallest vibrations in the air. It is made up of a thin layer of tissue that is stretched over a bony ring in the middle ear. When sound waves hit the eardrum, it vibrates, and these vibrations are then transmitted to the inner ear, where they are converted into electrical signals that are sent to the brain. The eardrum is so sensitive that it can respond to the movement of a single molecule, which is why we are able to hear sounds even when they are very quiet.

The Eardrum Is So Sensitive That It Can Respond to the Movement