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Driftly · Updated 3 November 2026

White, pink, or brown noise: which is best for sleep?

None of them is the proven best for sleep. White noise is a bright hiss, pink is smoother and often compared with steady rain, and brown emphasizes a low rumble. A systematic review rated the evidence that continuous broadband noise improves sleep as very low quality. Pick the one that masks your room at a modest volume, or use none.

What to do

The colors are real differences in the sound, not marketing grades. 'Best' would need a result the studies do not consistently show.

  1. Hear the difference in one sitting Play white, then pink, then brown at the same volume. White has more hiss. Pink pulls back the sharp top end. Brown (also called red noise in some texts) puts more energy in the low end, so it rumbles.
  2. Match the noise to the problem A high, sharp sound, such as a voice in the next room, is often covered better by a hissier noise. A low rumble, such as traffic, is often covered better by brown or by a fan. This is masking, which you can judge with your ears. It is not a sleep diagnosis.
  3. Keep the volume down Louder is not more effective once the nuisance is covered, and it is worse for hearing. Near a baby, skip maximum volume and keep the phone well away. Researchers measuring infant machines at 30 centimeters found levels above what hospital nurseries recommend.
  4. Read the claim, then ignore the superlative Two reviews, a 2021 systematic review on PubMed and a later perspective in the journal SLEEP, describe the evidence as weak, inconsistent, or equivocal. Some people in noisy rooms report a benefit. That is not the same as a treatment effect you can promise.

What not to do

  • Do not buy a story that brown noise 'cures' deep sleep, ADHD, or tinnitus. Driftly does not claim that, and the sleep evidence does not support it.
  • Do not sleep with the volume high enough that you would not hear an alarm you need.
  • Do not put a phone under a pillow to make it louder. The speaker and the battery both dislike that, and the sound pressure at an ear can be high.

Where Driftly helps

Driftly includes white, pink, and brown noise, and everyday sounds such as rain and a fan, so you can compare them offline and without ads. The app will not tell you which color is medically best, because that is not a thing we can say. View Driftly on the App Store

Other ways

A fan

A real fan is close to the 'brown-ish, moving air' sound a lot of people already know works for them. It needs no theory.

Silence, or earplugs made for sleep

If the room is already quiet, adding noise can be the thing that bothers you. The review literature includes studies where continuous noise did not help, and some where it made sleep worse.

Questions people ask

Is pink noise the same as white noise?

No. White is hissier. Pink drops off toward the high end, so it sounds smoother. People use 'white noise' in conversation for all of them. The colors are not interchangeable if you are describing the sound.

What about grey noise?

You will see more color names. Driftly's set for this question is white, pink, and brown, plus sounds like rain and a fan. Extra names do not create extra evidence.

Can I leave it on all night?

You can. Use the timer if you would rather it stopped. Keep the volume modest. All-night high volume is the pattern the infant-machine research warns against for babies, and it is unpleasant for adults too.

Does the color matter more than the volume?

For safety, volume and distance matter more. For whether you like it, the color is something you can hear. For whether it treats insomnia, neither one has strong evidence.

Sources

Written by Aivana LLC, New York, USA. Updated 3 November 2026. This is general information, not professional advice. Back to Driftly.