Hearing, noise and acustics
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Last updated 6:12 AM on 3/1/23
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9 Terms
1
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What happens when sound waves enter the ear?
They make the ear-drum vibrate. The ear-drum is a sheet of tight muscle and skin.
2
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What happens in the cochlea?
The vibrations are detected by tiny hair cells.
3
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What does the tiny hair cells in the cochlea send signals along to?
Along to the auditory nerve to the brain.
4
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What is unwanted sound called?
Noise.
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What unit does scientists check noise levels with?
Decibels (DB)
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Noise can get into a room through gaps round doors and windows. But can noise pass through walls, floors, ceiling and glass?
Yes.
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What can be used to reduce the transmission of noise or absorb the energy of sound waves?
Double glazing, carpets, curtains, and acoustic ceiling tiles.
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What does double glazing, carpets, curtains, and acoustic ceiling tiles do?
They absorb the energy of sound waves.
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