The other colors are similar to white noise, but with more energy concentrated at either the high or low end of the sound spectrum, which subtly changes the nature of the signal.

I asked an audiologist how white, pink, and brown noise influence your brain – and how you can use them to improve sleep, ...

But what is white noise, exactly? Why does it affect humans the way it seems to? And what, for that matter, is pink, violet, brown or blue noise? What does color even have to do with it at all?

Here’s what you need to know about the different colors of noise, what the research says, and how experts say this should all be applied in the classroom. What is white noise?

Some individuals, which Kwallek calls high-screeners, were able to block out the color “noise” of their surroundings, while others, low-screeners, were affected by it.

Pink noise is a color of noise, not entirely unlike white noise. Both white and pink noise contain all the frequencies that are audible to humans — 20 hertz to 20,000 hertz — but the way ...