Brown vs White Noise

At a Glance

The quick version. The rest of the page explains each row.

How Far Apart They Really Are

We measured both colours on this site in the same way. Brown noise gets steadily quieter as the pitch goes up, exactly as true brown noise should. White noise stays level: it has the same amount of sound at every pitch. What matters is the gap between them, and that gap grows with every step up in pitch.

It grows fast. In the deep sounds, the two can match. By the middle range, white is far louder. By the high, hissy range, white is at full strength and brown has almost nothing. That is not a small shade of difference. It is the difference between a sound being there and not being there.

We also set all five colours on this site to almost exactly the same loudness. So switching between them does not change how loud the room is. It changes only where the sound is. Brown puts nearly all of its sound in the deep range. White spreads it across every pitch, and about half of all its sound ends up in the very highest range.

Everything below follows from those two facts: the same loudness, spread in very different ways.

The Rule That Decides Which One You Need

A covering sound works on noises that are close to it in pitch. It does much less for noises that are far away in pitch. This is how the inner ear works, not an opinion, and it is the most useful thing to know before you choose a noise colour.

So the question is never "which colour is better". The question is "how high or low is the noise that keeps waking me?" Answer that, and the choice makes itself.

Brown noise covers what is deep. Traffic on a main road, air conditioning or a heating system, a lift motor, a fridge, footsteps on the floor above, the thump of a neighbour's music through the wall. All of these are deep sounds, and that is exactly where brown noise puts its sound.

White noise covers what is high and sharp. Words coming through a wall, a phone alert, a smoke alarm's low-battery chirp, birdsong at first light, a door closing, a dog. Voices are the important case. We understand words mostly through consonants, the sharp edges of speech, and these sit in the higher range where white noise is strong. Brown noise is very weak there, so turning it up does not help. You would need a huge amount of deep sound in the room before brown noise covered any words, and long before that, the deep sound would become the new problem.

This saves a lot of fiddling: once the noise has told you the answer, trying them side by side will not change it. Brown noise cannot hide a conversation, and white noise cannot hide a lorry, at any volume you could stand.

Your Speaker May Have Already Chosen for You

This practical point often gets skipped, and it decides the matter more often than not.

Phone speakers, laptop speakers and small Bluetooth speakers cannot play deep sounds well. For brown noise, the deep sound is not a detail. It is almost all of it. On a speaker like that, brown noise is not just quiet. It is mostly missing, and turning it up only makes the small part that is left louder. White noise has nothing important in the deep range, so it comes through almost whole on even the worst speaker you own.

So the first honest question is not which colour suits you. It is what you will play it on. On headphones or a speaker with real bass, brown noise is truly different and the comparison is fair. On a phone by the bed, you are comparing white noise with a small piece of brown noise. If you will use a phone and deep noise is the problem, sort out the speaker before you choose the colour. If you will use a phone and simply want something dark, green noise was built to work on small speakers.

One of Them Leaves the Room

Deep sounds pass through walls, floors and closed doors much more easily than high sounds. That is why you hear a neighbour's bass but not their words. The same is true of your own noise.

Brown noise loud enough to solve your problem can become someone else's problem. In a flat, a shared house, a room next to a baby's room, or a bed shared with a lighter sleeper, this matters. White noise stays where you put it: soft furnishings soak up high sounds, and an ordinary door stops them.

The same is true inside the room. You can hear where white noise is coming from, and moving the speaker further away changes how it sounds, because a room soaks up high sounds faster than deep ones. Brown noise seems to come from everywhere, so where you put the speaker barely matters and the sound fills the room evenly. That is nice when you want to be wrapped in sound. It is less nice when the person next to you would like to turn away from it.

Twenty Minutes Versus a Whole Night

Long listening gets tiring mostly because of high sounds. This is where the two colours differ over time, not just in what they cover.

White noise puts its sound where the ear is most alert. That makes it work well, and it also makes it tiring in a way that builds over hours, not minutes. Many people who gave up on a white noise machine did so around week two, not on the first night. Brown noise has almost no high sound to tire you, which is the main reason people run it all night, every night, for years.

So the result is not a winner but a split: a bright colour for short sessions when you need to cover something specific, and a dark one for the eight hours when you mostly need to notice nothing at all. Many people who use both end up doing this without ever planning it.

The Research Is One-Sided, and It Still Says Less Than You Might Hope

Most pages about brown noise leave out one fact: every controlled study in this area used white noise or pink noise. Brown noise has never been tested.

Nigg and colleagues (Journal of the American Academy of Child and Adolescent Psychiatry, 2024) looked at many studies of white and pink noise together, on attention tests done in a lab, in young people with ADHD or attention problems. They said clearly that they found no studies of brown noise. Not weak studies. None. Anything described as "brown noise, backed by research" is a guess based on a different sound, and these two sounds are very different, so it is not a safe guess.

It is tempting to decide that white noise is the proven choice. That goes much too far. For sleep, the key paper is Riedy, Smith, Rocha and Basner, Noise as a sleep aid: A systematic review (Sleep Medicine Reviews, 2021). It looked at 38 studies of steady white noise and similar noise. It rated the evidence that steady noise improves sleep as very low quality, and the authors note that this does not match how widely people use it. They also raised the possibility that steady noise may harm sleep and hearing. Noise websites often quote this review as if it supported them. It does not.

So, in short: one colour has been studied and the results are weak. The other has not been studied at all. That does not make either one a bad idea. It means the sound facts on this page are settled, and the health side is uncertain. Nothing here is medical advice. If you have trouble sleeping that does not go away, talk to a doctor, not to a noise machine.

On volume, one study is worth knowing, and it is about devices, not colour. Hugh and colleagues (Pediatrics, 2014) tested 14 baby sleep machines at full volume. Measured 30 cm away, all of them were louder than 50 decibels, about as loud as a quiet office. Three were louder than 85 decibels, about as loud as heavy traffic. At that level, more than eight hours would go past the noise limit set for adults at work. Any risk here comes from how loud and how long, not from which colour you pick.

A Test That Will Actually Tell You Something

Name the noise before you name a colour. Lie in the room at the time of night that is the problem, and work out what you actually hear. Rumble, machinery and thumps point to brown. Voices, chirps and birds point to white. Roughly half the people who ask this question find they are trying to cover two different noises, and need to fix the louder one where it starts.

Compare them at the same volume setting, not at the same feel. All the colours here are set to the same loudness, so for once the volume control is a fair test. Do not turn one up because it seems quieter. That feeling is exactly the difference you are trying to judge.

Give each one two nights in a row. The first night with any new sound tests how new it is. The second night tests the sound.

Judge by how often you wake, not by what you like. The colour you prefer while awake and the one that gets you through to morning are often different. Brown noise wins the first test much more often than it wins the second.

If both half-work, you probably want the one in the middle. Pink noise sits between them. It is the sensible answer if your honest verdict is "white is too sharp and brown is too heavy".

The Verdict, Such As It Is

Neither colour wins, and a page that names one winner is telling you about its writer, not about sound. What the measurements support is narrower and more useful: brown noise for deep noise and long nights, white noise for voices, sharp sounds and shorter sessions. One warning: a small speaker rules out brown noise, whatever the noise is.

On this site, both sounds are made fresh as they play, not looped from a recording, so neither has a repeat for you to notice at three in the morning. Free browser sessions run for 30 minutes. That is enough to compare them, but not enough for a night. The free BRW app (App Store, Google Play) has both colours, plus a sleep timer, offline play and play in the background. Brown noise has no time limit in the app, which is what you want when you need the sound to still be there at 4 am. White noise is free for one hour a day, and Premium removes that limit.

Frequently Asked Questions

Related pages

• Brown Noise for Sleep — The free web player, plus the full guide to brown noise for sleep, focus, and tinnitus.
• Noise Colour Test — Two questions and a listening test to find your noise colour.
• Brown Noise — The deepest colour: a steady rumble that is best for traffic noise and long nights.
• Brown Noise Generator — A real brown noise generator in your browser: made live as you listen, with no file and no loop.
• White Noise — The flat, bright colour, and the best of the five at making speech impossible to follow.
• Pink Noise — The balanced, natural-sounding colour: a good default, and the sound engineers use to test speakers.
• Brown vs Pink Noise — Almost the same in the deep sounds, far apart in the high ones, and one of them falls apart on a phone speaker.
• White vs Pink Noise — Two kinds of even: why the ear prefers pink, why white covers voices better, and why no study has ever ranked the two.
• Brown Noise for Tinnitus — Masking versus getting used to tinnitus, why the pitch of your tinnitus decides the colour, and where sound therapy really sits in the 2014 medical guideline.
• Sound Masking — Masking does not block sound. It raises the background so the noise stops standing out, and the colour has to match the noise.
• Block Traffic Noise — Your walls already removed the high sounds from the traffic outside. That is why brown noise covers it indoors and white noise does not.