The middle ground: less hiss than white noise, more presence than brown. A balanced, natural-sounding wash that many people find easiest to leave on all night.
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Noise "colours" describe how energy is distributed. White is flat, brown drops steeply at high frequencies, and pink sits between them — each octave carries equal energy, which is closer to how a lot of natural sound behaves, from rainfall to wind in trees.
That is why pink noise is often described as sounding more natural than the other two. It still masks sudden noise well, but without the sharp top end that makes white noise tiring for some listeners. Try switching between the three tiles on this page to hear the slope change.
Pink drops by about 3 dB per octave, brown by about 6 dB. Brown is much deeper and darker; pink keeps some mid and high detail.
There is no settled winner in the research. Try all three at low volume and keep the one you stop noticing.
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