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What happens inside the ear?
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When sound waves enter the ear, they pass along a short canal to the eardrum, which is a thin sheet of skin that vibrates when it is hit by the sound waves. The vibration moves three tiny bones on the other side of the eardrum. This movement sets in motion a fluid in a spiral tube (the cochlea) in the inner ear. Nerve cells connected to tiny hairs in the cochlea send signals to the brain. | | Sounds are caused by vibrations, which travel in waves. Sound waves are collected by the outer ear and directed into the aural canal. |
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Previous:
Back
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Book:
1001
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Section:
Human World
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Chapter:
Human Body: Organs
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