"Of course you don't make any noise in space, because there's no air"

This quote by Kevin J. Anderson is describing the truth that sound can not travel in a vacuum, such as outer space. Noise is developed by vibrations in the air, and considering that there is no air in area, there is no medium for noise to take a trip through. This implies that any sound made in area would not be heard, as it would not have the ability to take a trip. This is why astronauts must interact with each other using radios, as sound waves can not travel through the vacuum of space. This quote is a suggestion that noise is a product of the environment, which it can not exist without air.