Experiment guides → Bedroom & environment → White noise

Does white noise help you sleep?

A 2 × 7-night self-experiment guide · Last updated September 5, 2026

Quick answer: it depends on where you sleep, and the research is honest about not knowing more than that. A systematic review of 38 studies found the evidence for continuous noise as a sleep aid to be of very low quality, with some studies showing faster sleep onset and others showing more fragmented sleep. The clearest positive results come from noisy environments — a lab model of transient insomnia, and a small trial in a loud part of New York — where a steady sound masks the sudden noises that jolt you awake. In a quiet bedroom, adding sound has no obvious job to do. Seven nights on, seven nights off, and your own log will tell you which bedroom you have.

"I will play white noise at low volume all night for 7 nights, then none for 7."

What the research says

The pooled verdict: very low quality, both directions. Riedy and colleagues reviewed 38 studies of continuous noise (white, pink, broadband) used to help sleep. Study quality was poor, methods were inconsistent, and results split: some found shorter sleep onset, others found more fragmented or lighter sleep with noise. Their conclusion was that the evidence can't support a recommendation either way — and that potential harms haven't been studied enough (Riedy et al., 2021).

In a noisy lab, broadband sound sped sleep onset. Messineo and colleagues created transient insomnia in healthy sleepers by playing disruptive environmental sounds, then tested whether steady broadband sound helped. It did: sleep onset latency fell by 38% with the masking sound compared with without, and sleep quality ratings improved. The mechanism is masking — a steady hiss makes sudden sounds smaller relative to the background (Messineo et al., 2017).

In a loud city apartment, it helped too. Ebben's small crossover study followed people living in high-noise areas of New York City. A week with a white-noise device improved both self-reported and actigraphy-measured sleep compared with a week without. Ten participants, one city — but the same masking logic, in real bedrooms (Ebben et al., 2021).

What this evidence doesn't say

The positive studies are small and set in noisy conditions; there's no good evidence that white noise improves sleep in an already quiet room, and a few studies suggest continuous sound can lighten sleep. Long-term effects on hearing at typical bedside volumes haven't been studied. "White", "pink" and "brown" noise differ in spectrum, and the trials don't establish that one is better than another.

Run it as an experiment

  1. Three baseline nights, and a noise note. Sleep quality, restedness, time-to-sleep — plus what woke you, if anything. Traffic, a partner, a dog, plumbing: if you can name the culprit, masking has a job.
  2. Set the volume once, low. Quieter than a normal conversation — you should be able to hear someone speak over it. Louder isn't more effective; it just adds a second noise. Place the speaker across the room, not by your head.
  3. Block one: 7 nights on. "I will play white noise at low volume all night for 7 nights." Steady, uninterrupted sound, no timer — noise that stops mid-night is itself a sudden change.
  4. Block two: 7 nights off. Same everything, sound off. If the off-week feels worse, that's the masking working; if it feels the same, the sound wasn't doing anything for you.
  5. Compare wakings and restedness. Those are the outcomes masking should move. Better on? Keep it. Same or worse? Drop it — earplugs are the next experiment for a noisy room, and a quiet room doesn't need either.
Want this structured for you? Run it in N of 1 — baseline nights, morning check-ins and an honest result, ready to go. Your first experiment is free.

What to expect

In a noisy bedroom, people often notice fewer startled wakings within a few nights and a smoother fall into sleep. In a quiet bedroom, expect the two weeks to look alike — or the on-week to feel slightly lighter, which some studies reported. If the sound becomes something you "need" to fall asleep, that's a dependency worth knowing about; the off-week shows you whether it has formed.

Who should skip this

Infants: keep any sound machine well away from the cot and at low volume — paediatric guidance warns that some machines exceed safe levels at close range. If you have tinnitus or hyperacusis, talk to an audiologist first. Otherwise the risk is low, but don't wear earbuds all night at volume.

Frequently asked questions

Is white noise good or bad for sleep?

The honest answer from a 38-study review is "unproven either way". It most plausibly helps in noisy environments by masking sudden sounds, and least plausibly helps in a quiet room, where a few studies suggest it may lighten sleep slightly.

White noise vs pink noise vs brown noise — which is best for sleep?

The trials don't separate them convincingly. Pink and brown have more low-frequency energy and sound less harsh, which affects whether you'll tolerate them all night — that matters more than any proven sleep difference. Pick the one you find least intrusive and keep it constant.

Can you become dependent on white noise to sleep?

Some people report it. The off-week in this protocol is designed to show you: if sleep is clearly worse without it after a week on, a habit has formed. That's a trade-off, not a disaster — but it's better known than guessed.

Related experiments

Do earplugs improve sleep? · Does a no-phone-in-the-bedroom rule improve sleep? · Do you sleep better in a cold room?

Sources

  1. Riedy SM, Smith MG, Rocha S, Basner M. Noise as a sleep aid: a systematic review. Sleep Med Rev. 2021;55:101385. PubMed 33007706
  2. Messineo L, Taranto-Montemurro L, Sands SA, Oliveira Marques MD, Azabarzin A, Wellman DA. Broadband sound administration improves sleep onset latency in healthy subjects in a model of transient insomnia. Front Neurol. 2017;8:718. PubMed 29312136
  3. Ebben MR, Yan P, Krieger AC. The effects of white noise on sleep and duration in individuals living in a high noise environment in New York City. Sleep Med. 2021;83:256–259. PubMed 34049045

Track this experiment in N of 1

A few baseline nights, then the change — and your own mornings deliver the result. No streaks, no guilt. Your first experiment is free.

Downloadon the App Store

This page is general information about published research, not medical advice. If you have a sleep disorder, are pregnant, or take medication, talk to your doctor before changing your routine.