Brown noise for focus: does it help, and how to try it on a Mac

Brown noise for focus: how it differs from white and pink noise, what the limited evidence says, how loud is too loud, and Background Sounds on a Mac.

28 October 20265 min read

Brown noise is a deep, steady rumble, like strong wind or a waterfall heard from a distance, and many people find it helps them focus by covering up speech and sudden sounds around them. The evidence is limited and mixed: it helps some people, does little for others, and the only way to find out is to try it at a low volume for a few days.

You don't need to install anything to try it. Recent versions of macOS have something very close to brown noise built in, under the name Dark Noise.

White, pink and brown noise: what's the difference?

All three are random noise spread across every pitch you can hear. The color describes the balance between the low and the high end.

Noise	How the sound is spread	What it sounds like	Closest sound on a Mac
White	Equal energy at every frequency, so the high end stands out	Hiss, an untuned radio	Bright Noise
Pink	Energy falls as the pitch rises, so each octave gets an equal share	Steady rain, wind in leaves	Balanced Noise
Brown	Energy falls faster still, so the low end dominates	A rumble, distant surf, a plane cabin	Dark Noise

Brown noise is not named after the color. It takes its name from Robert Brown, the botanist whose observation of particles jiggling in water gave Brownian motion its name, because the sound can be made from the same kind of random wandering.

Most people find white noise harsh after a while, pink noise softer and brown noise the softest. That is a matter of taste rather than science, and it is probably why brown noise became the popular choice for long stretches of work.

Does brown noise actually help you focus?

There are two different claims mixed together here, and they have very different support.

Masking: the best supported part

Background speech is one of the most distracting sounds for reading and writing. Psychologists have studied this for decades under the name irrelevant speech effect: even when you try to ignore it, background speech, especially speech clear enough to follow, seems to compete with the part of the mind you use for words. Steady noise makes nearby talk harder to make out, so your attention stops snagging on it.

Any of the three colors can mask speech. Brown noise does it with less hiss, which is why many people can sit with it for longer. If your problem is an open office, a household or a café, this is the part most likely to help you.

Brown noise and ADHD

The bolder claim, that noise sharpens focus itself, especially for people with ADHD, rests on much less. A handful of small studies, mostly of white noise and mostly in children, suggest that some people with attention difficulties do slightly better on some tasks with background noise, while some people without them do worse. There is very little research on brown noise in particular, and much of its recent popularity came from social media rather than studies.

So treat it as an experiment, not a treatment. It doesn't treat ADHD, anxiety or ringing in the ears, and if any of those are affecting your work, a doctor is the right place to start.

Why it may help anyway

Even without strong evidence, brown noise can work as a cue. If the same sound starts every time you sit down to deep work, it can become part of the ritual that tells your brain it is time to begin, a bit like putting on the kettle before you write.

How loud should brown noise be?

Quieter than you think. Aim for just loud enough that nearby speech blurs into the background, well below the level you would play music.

Use the conversation test. You should still be able to hear someone speaking to you at arm's length. If you can't, it is too loud.
Remember the hours. Damage to hearing depends on how loud a sound is and how long you listen, and a working day is long. A low level for a long time is the safer habit.
Let your headphones help. Headphones that cancel noise lower the room first, so the brown noise can sit much lower.
Take the headphones off in breaks. Your ears and your attention both benefit from some quiet.
Listen to your ears. Ringing or a muffled feeling after a session means it was too loud. Turn it down, and if the ringing or muffling doesn't pass, see a doctor or an audiologist.

How to play brown noise on a Mac with Background Sounds

macOS includes Background Sounds, a set of steady sounds designed to mask unwanted noise. It sits in Accessibility settings, but anyone can use it.

Open System Settings > Accessibility > Audio (if your Mac shows it there; it arrived in recent versions of macOS).
Turn on Background Sounds.
Choose Dark Noise, the closest to brown noise. Balanced Noise sits nearer pink and Bright Noise nearer white, and there are nature sounds such as Ocean, Rain and Stream too.
Set the background sounds volume. Start low and raise it only until nearby talk blurs.
Turn on the option to switch off background sounds when your Mac is not in use, so it stops when the screen locks or the screen saver starts.

The first time you choose a sound, your Mac may need a moment to download it.

To switch it on and off without opening System Settings, go to System Settings > Control Center, find Hearing and choose to show it in the menu bar, if your Mac lists it. Background Sounds then sits one click away.

Make brown noise part of a focus routine

Noise works best as one piece of a routine rather than something that runs all day.

Pair it with a start. Noise on, one task chosen, a timer set. When the block ends, the noise goes off.
Test it honestly. Try a week of alternate days, with and without, on similar work. Note what you got done. If you can't tell the difference, you have your answer.
Keep some quiet. Turn it off for breaks, calls and the walk to the kitchen.
Try music as well. Some people focus better with instrumental music than with noise. Songs with words tend to compete with reading and writing.

For the rest of a setup that protects a stretch of hard work, such as one window, a plan and a clear end, see setting up a Mac for deep work. If what you miss is company rather than quiet, body doubling may suit you better than any sound.

Brown noise and Notchpals

Notchpals makes no sound at all. Its characters come out of the notch with a speech bubble and go back in, so a reminder never cuts across your noise or your headphones with a chime. That makes it an easy companion for long sessions with Background Sounds running.

If Debug, the rubber duck, is your Focus character, start a focus session from the Notchpals menu bar at the same moment you turn the noise on. Sessions last 25 or 50 minutes. Until it ends, the water and posture reminders wait, and when the time is up Debug comes back to close the session.

Debug, Focus: **Focus done**, when a focus session ends

Switch the noise off when Debug turns up. A few minutes of real quiet before the next block is good for your ears, and it keeps the sound working as a signal that means "start".