Brown noise for focus: does it work, and for whom?

Brown noise might help you focus, but nobody has properly tested it yet. The research that exists is on white and pink noise: a 2024 meta analysis found a small benefit on attention tasks for young people with ADHD or strong ADHD symptoms, and a small cost for everyone else. Brown noise is a reasonable thing to try. It is not a proven focus tool.

That is a less exciting answer than the one you get on TikTok, where brown noise videos promise to quiet an ADHD brain in seconds. Below we explain what brown noise actually is, how it compares with white and pink noise, what the studies found (including the ones that did not go the way people hoped), and how to test it on yourself in two weeks.

Roomie Cafe makes a free focus timer you share with friends, so we have a stake in the bigger question of what helps people focus. We will come back to that at the end, briefly.

What brown noise is

Brown noise is a random sound where the deep, low notes are much louder than the high ones. It sounds like a low rumble: a waterfall, heavy wind, or the hum inside an airplane cabin.

The name has nothing to do with the color. It comes from Robert Brown, the Scottish botanist behind Brownian motion, because the signal changes in a random walk pattern. Technically, brown noise is noise whose power falls in proportion to the square of the frequency, a 1/f² spectrum [1]. In plain words: every step up in pitch, the sound gets a lot quieter, so almost all the energy sits in the bass.

Cleveland Clinic notes that brown noise became popular mainly through social media testimonials on TikTok and streaming services, and that the science has not caught up with that popularity [2].

Brown vs pink vs white noise

All three are steady, random sounds that contain every frequency you can hear. What changes is how the loudness is spread across those frequencies. A team at Oregon Health & Science University put it simply: white noise sounds like static, while pink and brown noise put more power in the low frequencies and may sound like rain or a waterfall [3].

	White noise	Pink noise	Brown noise
How the energy is spread	Even across all frequencies	Lower frequencies louder, highs softened	Lower frequencies much louder, highs fall away fast (1/f²) [1]
Sounds like	Radio static, a hissing fan	Steady rain, ocean waves	A waterfall, distant thunder, a deep rumble
How it tends to feel	Bright, busy, sometimes harsh	Softer, more natural	Deep, muffled, calm to many people
Focus studies in people with ADHD	Several, mostly small, in children and students	A few, often grouped with white noise	None found in the 2024 meta analysis [3]
Effect in people without ADHD	Slightly worse task performance on average [3]	Grouped with white noise in that result [3]	Not tested
Good first pick if	You need to mask voices and chatter	White noise feels too sharp	Higher sounds bother you or you want something soothing

The ratings in the "How it tends to feel" row are what most listeners report. They are not measured effects. One 2025 study found that the three colors did not differ in pupil size, a common physical marker of arousal, in 31 people listening to short clips [4]. So the "brown noise calms you down, white noise wakes you up" story is, so far, more about taste than physiology.

Does brown noise help you focus? What the research says

The short version: background noise seems to help some people a little and hurt others a little, and nobody has tested brown noise on focus in a careful way.

The early ADHD studies

The idea goes back to Göran Söderlund and colleagues at Stockholm University. In 2007 they had children with ADHD and children without it do memory tasks with and without white noise playing. Noise improved performance in the ADHD group and made it worse in the control group [5]. Their explanation, the Moderate Brain Arousal model, proposes that people with lower dopamine activity need more outside stimulation to perform at their best [5, 6].

A follow up in 2010 tested 51 secondary school pupils on a word recall task with white noise at 78 decibels or without it. Noise helped the inattentive pupils and hurt the attentive ones, which closed the gap between the two groups [7]. The authors themselves said the finding needed replicating in a larger sample with more noise levels [7].

The 2024 meta analysis

The best summary so far is a systematic review and meta analysis by Joel Nigg and colleagues in the Journal of the American Academy of Child and Adolescent Psychiatry [3]. They pooled 13 studies with 335 children and college age young adults with ADHD or high levels of ADHD symptoms. The findings:

White and pink noise gave a small but statistically significant benefit on lab tasks (Hedges' g = 0.249).
In comparison groups without ADHD, white and pink noise had a small negative effect (g = −0.212).
No studies of brown noise met their criteria.
The authors called for more studies to confirm the effect and to work out safe and appropriate volume levels.

An earlier 2019 review reached a similar, cautious place: white noise improved some tasks affected by ADHD, not all, and real world use still had practical hurdles [8].

Newer studies that complicate the story

A pure tone worked as well as pink noise. In a 2024 study of 60 adults with varying ADHD traits, sound helped people with higher ADHD traits on a reaction time task, but a plain 100 Hz hum helped just as much as pink noise. The authors say this casts doubt on the idea that random noise works through a special mechanism [9]. Any steady background sound may do the job.
Brown noise did nothing measurable in one attention test. A 2025 study had 26 young adults do an attention task in four conditions: slow beat music, fast beat music, brown noise and silence. Slow beat music improved several measures and lowered heart rate. Brown noise did not differ from silence [10].
No arousal difference between colors. As above, white, pink and brown noise produced the same pupil response in a 2025 lab study [4].

So, does it work?

For people with ADHD or strong attention problems, steady background noise has a small effect in the lab, and brown noise is a plausible version of that noise. For people without attention problems, the average effect of noise on hard tasks is slightly negative. If brown noise helps you, that may be because it masks distractions, because you like it, or because it acts as a "start working" cue. All of those are real benefits, even if they are not magic.

Brown noise and ADHD: who it is most likely to help

Based on what has been studied, you are more likely to notice a benefit if:

You have ADHD, or you get bored and restless quickly in quiet rooms.
Your environment has irregular noise you cannot control: talking, traffic, a TV in the next room. Steady noise covers sudden sounds.
High pitched sounds (like white noise) irritate you, so you have given up on noise before.
Your task is long and repetitive rather than heavy on language.

You are less likely to benefit if you already focus well in silence, or if you are doing something where you need to hold words in your head, like close reading or writing. The studies above found that people without attention problems did slightly worse with noise on average [3, 5, 7].

If you want broader strategies, our guide on how to focus with ADHD covers more of them, and ADHD paralysis covers the moments when starting is the hard part. Noise is not a treatment for ADHD, and it does not replace talking to a clinician.

How to use brown noise for focus

Keep the volume low. Aim for a level you could easily talk over. Louder is not better, and the meta analysis authors specifically flag safe volume as an open question [3]. The WHO estimates that over 1 billion young adults are at risk of permanent, avoidable hearing loss from unsafe listening [11].
Use speakers or open headphones when you can. If you use earbuds for hours, take breaks.
Pick a long, unchanging track. A 10 hour video or an app loop is fine. Avoid versions with fades, birdsong or music mixed in if you are testing noise on its own.
Start it at the same time as your timer. Pairing the sound with a fixed block, such as a 50 minute focus timer, turns it into a cue that work has begun.
Turn it off in breaks. Silence between blocks keeps the sound from fading into the background completely.

Run a two week test on yourself

Because the evidence is thin and people differ, your own data matters more than any headline. Here is a simple test.

Step	What to do
1. Pick one task type	For example, problem sets, coding, or cleaning up notes. Keep it the same throughout.
2. Alternate days	Day 1 brown noise, day 2 silence (or your usual setup), and so on for 10 working days.
3. Same block length	Use the same timer length each day, for example two 50 minute blocks.
4. Write one line after each block	What you got done, plus a 1 to 5 score for how focused you felt.
5. Compare	After 10 days, look at both the output and the scores for noise days vs quiet days.

If the noise days are clearly better, keep it. If there is no difference, keep it only if you enjoy it. If quiet days win, you have learned that you are one of the people for whom noise is a small cost.

Sound helps. So do people.

Brown noise works, when it works, by changing the room around you. Another way to change the room is to share it. Working while someone else is present, often called body doubling, is one reason people pay for coffee shops and play café ambience at home; we cover that setup in how to recreate a study café at home. If you prefer music to noise, lofi for studying looks at what the research says about beats without lyrics.

Roomie Cafe is a free focus timer you share with friends. You press start, pick what you are working on, and see who else is focusing right now. There is no webcam and no microphone, so your brown noise stays on. When the timer ends you write a line about what you got done, which also makes the two week test above easy to keep. It runs on the web and as an iPhone, iPad and Mac app.

FAQ

Is brown noise good for ADHD?

It might help a little, but it has not been tested directly. A 2024 meta analysis found that white and pink noise gave a small benefit on lab attention tasks for young people with ADHD or strong ADHD symptoms, and found no brown noise studies [3]. Brown noise is a low risk thing to try at a safe volume.

Is brown noise better than white noise for focus?

There is no evidence either way. Most of the focus research used white or pink noise. Brown noise is deeper and many people find it more pleasant, which is a good reason to choose it, but no study shows it works better.

Why does brown noise feel so calming?

Most of its energy is in low frequencies, so it lacks the hiss that makes white noise feel harsh. That said, a 2025 study found no difference in pupil linked arousal between white, pink and brown noise [4], so the calm may come more from preference and masking than from a different effect on your body.

Is it OK to listen to brown noise all day?

Keep the volume low, take breaks, and be careful with earbuds over long stretches. Hearing damage depends on loudness and time, and researchers have not yet set safe levels for focus noise specifically [3, 11].

Does brown noise help you sleep?

The evidence is weak. Cleveland Clinic summarizes reviews that found limited evidence that continuous noise improves sleep [2]. If it helps you fall asleep and the volume is low, it is unlikely to hurt.

References

EBSCO Research Starters. Brownian noise. Retrieved 24 October 2026.
Cleveland Clinic. (2024, March 28). Brown noise may help you focus and relax. Health Essentials. Retrieved 24 October 2026.
Nigg, J. T., Bruton, A., Kozlowski, M. B., Johnstone, J. M., & Karalunas, S. L. (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 and Adolescent Psychiatry, 63(8), 778 to 788.
Erfanian, M., Chait, M., & Kang, J. (2025). Pupil-linked arousal does not differ between 'white', 'pink' and 'brown' noises. International Journal of Psychophysiology, 218, 113271.
Söderlund, G., Sikström, S., & Smart, A. (2007). Listen to the noise: Noise is beneficial for cognitive performance in ADHD. Journal of Child Psychology and Psychiatry, 48(8), 840 to 847.
Sikström, S., & Söderlund, G. (2007). Stimulus-dependent dopamine release in attention-deficit/hyperactivity disorder. Psychological Review, 114(4), 1047 to 1075.
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.
Pickens, T. A., Khan, S. P., & Berlau, D. J. (2019). White noise as a possible therapeutic option for children with ADHD. Complementary Therapies in Medicine, 42, 151 to 155.
Rijmen, J., & Wiersema, J. R. (2024). Stochastic resonance is not required for pink noise to have beneficial effects on ADHD-related performance? The moderate brain arousal model challenged. Neuropsychologia, 202, 108961.
De Francesco, L., Schintu, S., Mazza, A., Ricci, R., & Dal Monte, O. (2025). What you listen to makes a difference: The impact of music on attention and well-being. Annals of the New York Academy of Sciences, 1552(1), 273 to 283.
World Health Organization. (2026, March 3). Deafness and hearing loss. Fact sheet. Retrieved 24 October 2026.