Random Interesting Fact #4: Colours (colors) of noise

You may have heard of white noise already. It is most often associated with that static sound when you get to a TV channel with no reception. However, there are many other colors of noise including: pink, brown, blue, purple and grey.

The colours of sounds are supposed to be analogous to the colours of light: for example, if you were to change the spectrum (energy formation) of purple sound and convert it into light, you get purple light.

Pretty weird. I came across this looking for a way to cancel the sounds from my fellow co-workers. It is said that pink noise can achieve this effect. But when it is playing directly in your ear, through earbuds, it's a little annoying.

Read more at Wikipedia: Colors of Noise

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