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Do you need air for sound to travel?

Updated: 8/19/2019
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11y ago

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Sounds are pressure waves - and they need something (medium) to compress and rarefy. Air is one medium, but water, steel, rock and most other substances can have sound waves.

In vacuum there is nothing, no medium, so no sound can travel.

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11y ago
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How do sound waves travel what do sound waves need in order to travel?

sound waves bounce off of walls. they need air to travel.


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