Brown noise vs white noise: which one helps you focus?
Short answer: white noise is bright and hissy, and brown noise is deep and rumbly. Pink noise sits between them. Studies show a small focus benefit from white and pink noise for people with ADHD or attention problems. Brown noise hasn't been properly studied yet. For everyone else, the best noise is the one you can forget is playing, at a low volume.
The colours of noise, in plain words
All three are random sound spread across every pitch. What changes is how the energy is shared between low and high pitches.
| Sounds like | Good at | |
|---|---|---|
| White | TV static, a hissing radio | covering sharp, high sounds (clicks, keyboards) |
| Pink | steady rain, wind in trees | a balanced all-round cover; easier on the ears than white |
| Brown | a waterfall from far away, a plane cabin, low surf | a soft, deep bed; covers rumble; the least tiring for many people |
What the research actually says
For ADHD and attention problems, there's a small but real effect. A 2024 meta-analysis in the Journal of the American Academy of Child & Adolescent Psychiatry pooled 13 studies (335 children and young adults with ADHD or high attention-problem scores). Working with white or pink noise gave a small, consistent improvement on attention tasks. The authors call it promising and low-risk. They also say it's smaller than the effect of medication and that more research is needed.
For brown noise specifically, there's almost no direct evidence. The same review found no qualifying studies that used brown noise. Its popularity (it took off on social media in 2022) comes from people's experience, not from trials. That doesn't mean it doesn't work for you. It means no one has measured it yet.
For people without attention problems, results are mixed. One leading idea, the "moderate brain arousal" model, suggests that noise helps brains that are under-stimulated and can distract brains that are already alert. In a 2010 study by Söderlund and colleagues, white noise improved memory in inattentive school children but slightly lowered it in attentive ones.
The practical takeaway: try it, and pay attention to whether it helps you. If you find yourself noticing the noise, it isn't helping.
How to choose
- Open office or chatty café: pink or white noise covers speech better than brown does, because brown has little energy in the pitch range of voices.
- Long sessions, or white noise feels harsh: brown. Its lack of hiss is why many people can leave it on for hours.
- Pure noise feels empty: try natural sound instead. Rain and a crackling fire are noise-like underneath, with just enough texture to feel like a place. See lo-fi and ambient sound for focus.
Keep the volume low
Noise is meant to sit underneath your thoughts, not on top of them. Set it just loud enough to blur the background and no louder. The WHO's safe-listening guidance for adults is under 80 dB for up to 40 hours a week. Steady noise through headphones is easy to turn up without noticing, so start low and stay there. With noise-cancelling headphones you usually need much less.
Noise in hokkori
Hokkori doesn't have a plain white or brown noise button. Its rain and fireplace are real recordings, which do the same job as noise: steady, broadband sound with no melody to follow. When they can't load (for example, offline on a first visit), hokkori builds them from noise instead: the rain from filtered broadband noise with droplets on top, the fireplace from a bed of brown noise with crackles. Each has its own volume slider, so you can mix them under lo-fi or play them alone. There's more detail in how hokkori makes its sound.
Questions people ask
Is brown noise better than white noise for focus?
No study shows that yet. Brown noise is gentler and many people find it easier to listen to for a long time. White and pink noise are the ones with measured benefits, mainly for people with attention difficulties.
Does brown noise help with ADHD?
Many people with ADHD say it does, but the 2024 meta-analysis found no controlled studies of brown noise. White and pink noise showed a small benefit. Brown noise is low-risk to try, so it's reasonable to test it on yourself.
Is it OK to listen to noise all day?
At a low volume, generally yes. Keep it under 80 dB, give your ears quiet breaks, and turn it off when you don't need it.
What is pink noise?
Pink noise sits between white and brown. Each octave has equal energy, so it sounds balanced and natural, like steady rain.
Sources
- Nigg, J. T. et al. (2024). “Systematic Review and Meta-Analysis: Do White Noise or Pink Noise Help With Task Performance in Youth With Attention-Deficit/Hyperactivity Disorder or With Elevated Attention Problems?” Journal of the American Academy of Child & Adolescent Psychiatry. doi:10.1016/j.jaac.2023.12.014.
- Söderlund, G. B. W., Sikström, S., Loftesnes, J. M., & Sonuga-Barke, E. J. (2010). “The effects of background white noise on memory performance in inattentive school children.” Behavioral and Brain Functions, 6:55. doi:10.1186/1744-9081-6-55.
- World Health Organization, “Deafness and hearing loss: safe listening”. who.int.