Brown noise for sleep

Brown noise helps many people sleep by covering up the sounds that wake them — traffic, footsteps, a partner’s snoring — with a steady, deep rumble. Keep it quiet, put the speaker across the room, and use a timer if you only need help falling asleep. Research on noise and sleep is limited, so treat it as something worth trying rather than a cure.

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Why it can help: masking

What wakes you is usually not the loudness of a sound but its change: a door slamming in a quiet room stands out sharply. Continuous noise raises the background level, so the same door is a smaller jump above it. Brown noise puts its energy in the low frequencies, where traffic rumble, footsteps and snoring sit, and it has no hiss, so it is easy to stop noticing.

How to use brown noise for sleep

1. Start quiet. Turn it up only until the disturbing sound fades into it. What feels right while you’re awake is often louder than you need asleep.
2. Move the speaker away from your head. Across the room, not on the pillow. Distance lowers the level at your ear and spreads the sound more evenly.
3. Pick timer or all night. If you only struggle to fall asleep, a 30–60 minute timer that fades out is enough. If noises wake you through the night, leave it on.
4. Pick the sound that fits. Deep for low rumble, Classic for general use, Rainfall if you also need to cover voices, Ocean if you prefer gentle movement to a steady tone.
5. Give it a week. A new sound in the bedroom can be noticeable for a few nights before it fades into the background.

What the research says

A 2021 systematic review in Sleep Medicine Reviews looked at studies of continuous noise played to help sleep. It concluded that the quality of evidence was very low and the results mixed, including studies that found no benefit. Most of that research used white or pink noise; brown noise specifically has hardly been studied.

So the honest summary is: brown noise is a low-risk thing to try if your sleep is disturbed by noise, and plenty of people swear by it, but no study shows it improves sleep for everyone. If you have persistent insomnia, a doctor or a CBT-I programme is the evidence-backed route.

Babies and sound machines

A 2014 study in Pediatrics measured 14 infant sleep machines and found that, at maximum volume, many could produce sound levels considered unsafe for long exposure when placed close to the crib. If you use brown noise for a baby: keep the volume low, place the speaker well away from the cot, and consider a timer. Your paediatrician is the right person to ask about your child.

Using it on your phone

Browsers on phones usually pause audio when the screen locks, so for a full night on an iPhone, an app works better than this page. The Brown Noise Player app keeps playing with the screen off and has a sleep timer that fades out gently.