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Can sound be heard in a vacuum?

Updated: 9/17/2023
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14y ago

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No.

Sound consists of mechanical vibrations within a medium (such as the air). Within a vacuum, there is no such medium, and thus no sound.

(However, solid objects will still vibrate in a vacuum, and an observer in direct contact with a vibrating object would be able to "hear" these vibrations despite the lack of air.)

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14y ago
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Q: Can sound be heard in a vacuum?
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