NPR News: Jim Hudspeth: How Do We Hear — And How Do We Lose Our Ability To Hear?

Jim Hudspeth: How Do We Hear — And How Do We Lose Our Ability To Hear?
Over 30 million people in the U.S. have hearing loss. Neuroscientist Jim Hudspeth explains how the ear's thousands of hair cells function to amplify sound—and how they can be damaged but not repaired.

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