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This video segment from IdahoPTV's D4K begins with a demonstration of how a sound is made and then shows how a sound wave is transmitted to the brain through the parts of the ear. Discover why loud sounds can be permanently harmful to your ears and how the cochlea is involved in helping you maintain your balance. Learn how people communicate when their hearing is lost.
Visit the D4K companion Web site to learn more about Hearing: D4K: “Hearing"
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