Brown Noise: What It Is & Why People Use It for Sleep & Focus
Updated: 6 days ago
Brown noise is the deepest of the common noise colours: a low, steady rumble like a strong waterfall or distant thunder. It became hugely popular online for sleep and focus. Here is what brown noise is, what research does and doesn’t say, and how to listen.
What is brown noise?
Brown noise (also called Brownian or red noise) has much more power in the low frequencies and much less in the high ones. Its name comes from Brownian motion, the random movement of particles, not from the colour. It sounds deep, warm and rumbling.
Why people use brown noise
Its deep, smooth sound masks low rumbles like traffic or a boiler, and it has none of the hiss that some people dislike in white noise. Many listeners describe it as calming or as quieting a busy mind.
What does the research say?
There is very little research on brown noise specifically. Many people with ADHD say it helps them focus, and some small studies found that background noise (mostly white noise) improved attention in some children with ADHD. That is promising but not proof, and brown noise has not been tested well on its own.
What people use brown noise for
Falling asleep: a deep, steady rumble at low volume.
Focus and studying: a background sound that quiets distractions.
ADHD focus: many people with ADHD use it while working, based on personal experience.
Masking low noises: traffic, a boiler or a neighbour’s music.
Flights and travel: a calm, steady sound over engine noise.
How to use brown noise safely
Keep the volume low, around the level of a quiet conversation or lower.
Place the speaker away from your head, not on your pillow.
Speakers work fine; you don’t need headphones for noise.
For babies, keep the device well away from the crib and the volume low.
If you use it all night, a sleep timer or a gentle fade-out can help.
Brown noise vs white noise
White noise is bright and hissy, while brown noise is deep and rumbling. Brown noise is often more pleasant for long listening; white noise is better at masking high-pitched sounds like voices.
Listen in the Healing Sounds app
Healing Sounds has free brown noise plus white, pink, brown and blue noise, rain, ocean, forest and fan sounds, binaural beats and solfeggio frequencies. Mix brown noise with rain or ocean sounds to make your own blend.
Long sleep sound videos are on our Healing Sounds YouTube channel.
Frequently asked questions
Does brown noise help with ADHD?
Many people with ADHD say it helps them focus, and some small studies found background noise helped attention in some children with ADHD. Brown noise itself has not been studied well, so try it and see if it works for you.
Is brown noise good for sleep?
Many people find its deep sound relaxing at night. Keep the volume low and the speaker away from your head.
Do I need headphones for brown noise?
No. Noise works well through a speaker. Many people prefer a speaker for sleep so they don’t wear headphones all night.
How loud should brown noise be?
Quiet: around the level of a soft conversation or lower, with the speaker away from your head. If you have to raise your voice over it, it is too loud.
Explore more guides
This article is for general information about sound and relaxation. It is not medical advice. If you have trouble sleeping, hearing concerns or tinnitus, please talk to your doctor.
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