Colors of Noise: Why is White Noise White?

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You’ve probably heard people talk about white noise to describe a rushing, static-like sound. The term white noise seems like a paradox. How can a sound have a color? Isn’t sound invisible?

Yes, you are absolutely correct—sound waves traveling through air are just as invisible to the naked eye as are the air particles themselves. (In order to “see” sound, you would need to be able to see the locations and movement of the air particles.)

The origin of the term goes ...

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