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Is there sound in space? If a person could survive in space without oxygen or a helmet, could we hear one another?
Question Date: 2018-03-14
Answer 1:

The short answer is no - unless you're in a place like the space station where you have air for sound to travel through.

For example, you could be in space, swimming through a pool of water, and there would be sound that could be heard in the water. For sound to exist, sound waves need to be able to travel through a "medium" (medium = stuff, like air, water, or steel), so because space is a vacuum (no air, no water) there is no way for sound waves to move.

All the best!

Answer 2:

In parts of space with very low densities of gases, sound would not travel because sound waves need a liquid, solid, or gas to propagate through. Sound reaches us by traveling through air, water, and solid objects and finally "pushing" on our ear drums, resulting in vibrations that our cells and brains can process.

There is such a low density of solids, liquids, or gases in space that sound waves would have nothing to pass through to reach our ears, so we would not be able to hear each other.

Answer 3:

No. Sound is a vibration, which means that it needs something to vibrate in order to pass through it. Space is empty. There is nothing to vibrate in space. As a result, sound does not travel through space. The only way you can hear what astronauts are saying is by radio, since radio is a type of light, and light can go through space.

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