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Why isn’t sound distorted in a rocket if there is zero gravity in space?

Sound is a pressure wave in air. If you could see sound, what you would see is molecules of air banging into each other. When the wave hits your ear, you hear this as sound. So the question is, would the absence of gravity change the form of a pressure wave in air? And the answer is not much, because the gravitational force on a molecule of air on earth is balanced by the buoyant force (the pressure of air underneath the molecule) to the molecule is effectively in free fall. Readmore..

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