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What must astronauts use microphones and headphones in outer space

What must astronauts use microphones and headphones in outer space
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What must astronauts use microphones and headphones in outer space

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User Thatseeyou
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In order for sound to be hear, it must travel through a medium, such as air, through which its waves can make a disturbance. In space there is no air, so microphones must be used.
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User Tobias Lorenz
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