Brown, Pink or Green Noise for ADHD Focus: What the Research Says

If you spend any time in ADHD communities online, you have seen the posts: “I put on brown noise and my brain finally went quiet.” Millions of people now work to a deep, rumbling hiss. But does it actually help, and is brown better than white or pink?

What the research says about noise and ADHD

The best summary so far is a 2024 systematic review and meta-analysis by Joel Nigg and colleagues, published in the Journal of the American Academy of Child and Adolescent Psychiatry. It pooled 13 randomized studies with 335 children and young adults who had ADHD or high ADHD symptoms.

The findings, in plain English:

• White and pink noise gave a small benefit on lab tasks that measure attention, compared with quiet.
• People without ADHD did slightly worse with the same noise.
• No studies of brown noise met the review’s criteria, so its effect is simply unknown.

“Small” matters here. Noise is not going to transform anyone’s day on its own. But it is cheap, low-risk and easy to try, which is why researchers called it a possible low-cost tool worth studying further.

Why might noise help an ADHD brain?

One explanation is the moderate brain arousal idea from Swedish researchers Göran Söderlund and Sverker Sikström. It suggests that some ADHD brains are under-stimulated in quiet surroundings, and that a steady background noise nudges them toward a level where focus comes more easily. For people who already sit at that level, extra noise tips them over into distraction.

It is a hypothesis, not settled science, but it fits the pattern people describe: silence feels loud, and steady sound feels calming.

Brown vs pink vs green: what’s the difference?

All three put less energy in the high frequencies than white noise does:

• Brown noise is the deepest, like distant surf or a waterfall heard from inside.
• Pink noise is a middle ground, like steady rain.
• Green noise focuses on the middle frequencies and sounds natural and soft.

The research only tells us that white and pink noise helped on average. In daily life, comfort matters as much as anything: a sound you can tolerate for two hours beats a “better” sound you switch off after ten minutes. For the full comparison, read noise colors explained.

How to find your noise in a week

1. Pick one task type. For example, writing, studying or email.
2. Try one color per day. Brown on Monday, pink on Tuesday, green on Wednesday, white on Thursday.
3. Use the same timer. One or two 25-minute Pomodoro blocks per session.
4. Keep the volume low. You should be able to talk over it.
5. Write one line afterwards. How easy was it to start? Did you notice the sound?

The winner is usually the one you stopped noticing. If none of them help, that is useful information too, and you might prefer body doubling sounds or silence.

Try it in Solbox

Solbox has 15 noises, including brown, pink, green, white and grey, plus warm textures like Amber Drift and Earth Hum. Brown noise is free, and every noise can run under a Pomodoro timer with the countdown on your Lock Screen.