Written by the Nuvirox Research Team
Key points
- The evidence that white noise improves sleep is surprisingly weak; a systematic review rated the overall quality as very low.
- It may help by masking disruptive sounds, but some research suggests continuous noise can actually reduce deep sleep.
- Pink noise tends to perform better than white noise in studies, and effects vary a lot from person to person.
Short answer: white noise might help by masking other sounds, but the evidence is thin—and it may even cost you some deep sleep. Despite how popular sound machines and apps have become, the controlled research is mixed and generally low quality. For some people in noisy environments it's a reasonable tool; for others it offers little, and there's a real possibility it slightly lightens sleep. This is a case where the marketing has outrun the science.
How is white noise supposed to work?
The core idea is masking. White noise is a steady, broadband sound that blends the peaks and dips of intermittent disturbances—a slamming door, traffic, a snoring partner—into a more uniform background, so sudden noises are less likely to jolt you awake. That's a plausible mechanism, especially in genuinely noisy settings like a city apartment or a hospital ward. The question isn't whether masking makes sense in theory; it's whether it reliably improves sleep in practice.
What human studies actually show
Study snapshot — Riedy 2021 systematic review
| Scope | 38 studies of continuous noise as a sleep aid |
| Finding | Results ranged from noise improving sleep to disrupting it |
| Verdict | Quality of evidence for benefit graded very low—contradicting its widespread use |
A second review reaches a similar conclusion. A systematic review of auditory stimulation for sleep found that across dozens of studies, only a minority of white-noise trials reported clear benefit—and pink noise tended to fare better. The authors found no strong evidence to support routine use, while noting that short-term use caused no adverse effects. So it's low-risk, but also low-confidence.
The honest counterweight: it might lighten your sleep. Beyond “it may not help,” some analysis suggests continuous noise can actually shorten deep sleep—the most restorative stage. That's the genuinely surprising part: a habit marketed as a sleep aid may, for some people, subtly work against the sleep quality they're chasing. The masking benefit and the deep-sleep cost can pull in opposite directions.
What white noise won't do
White noise won't fix sleep that's broken from the inside—insomnia driven by arousal and anxiety, breathing problems, or an off-kilter body clock. It only addresses external sound. If your environment is quiet and you still sleep poorly, a sound machine is unlikely to be the answer, and the effort is better spent on the habits with stronger evidence—starting with a cool, dark room and consistent timing.
If you want to try it anyway
Given the low risk, a short trial is reasonable—especially if your bedroom is genuinely noisy. Keep the volume modest rather than loud, since louder isn't better and could be more disruptive. Consider pink noise (a softer, lower-pitched variant) which edges out white noise in some studies. And treat it as an experiment: if after a couple of weeks your sleep is the same or worse, it's fine to drop it. For children and infants the picture is different and warrants extra caution on volume, so this guidance is aimed at adults.
Frequently asked questions
Does white noise actually help you sleep?
The evidence is weak. A systematic review rated the quality of evidence for white noise improving sleep as very low, with results ranging from helpful to disruptive. It may help in noisy environments but isn't a reliable sleep aid.
Can white noise hurt your sleep?
Possibly. Some analysis suggests continuous noise can reduce deep sleep, the most restorative stage. It's low-risk overall, but it's not guaranteed to be beneficial—and may subtly lighten sleep for some people.
Is pink noise better than white noise?
In several studies, yes—pink noise (softer and lower-pitched) tended to outperform white noise for sleep. If you're experimenting, it's a reasonable version to try.
Should I use a sound machine every night?
If it genuinely helps in a noisy environment and you sleep well, there's little harm. But if your room is quiet or your sleep doesn't improve, the stronger evidence points to habits like light, timing, and temperature instead.
Is brown noise better than white or pink noise?
Brown noise is deeper and lower-pitched than white or pink, and some people find it more soothing, but the controlled evidence comparing the variants is thin. Pink noise has the most supportive (though still limited) data. If you're experimenting, preference is a reasonable guide given how weak the overall evidence is.
Can I use white noise for my baby?
The picture for infants differs from adults and warrants extra caution, particularly around volume and placing devices away from the crib. This article is aimed at adults; for a child, follow pediatric guidance on safe sound levels rather than applying adult advice.
Why masking helps some settings more than others
White noise's one plausible benefit—masking—depends heavily on your environment. In a genuinely noisy setting, like an apartment on a busy street, a shared room, or a hospital ward, a steady background sound can blunt the sudden noises that would otherwise jolt you awake, and that's the scenario where the limited positive evidence tends to come from. In a quiet bedroom, there's little for the noise to mask, so you're left with the possible downside—a constant sound that may itself lighten sleep—and not much upside. Matching the tool to the problem matters.
This also explains why personal experience with white noise is so divided. Someone in a noisy environment may genuinely sleep better with it; someone in a silent one may be adding a disruptor for no reason. Neither is wrong about their own experience—the context is doing the work, which is part of why the averaged trial evidence comes out so muddy.
A sensible way to test it on yourself
Because the research can't tell you whether it'll help you specifically, a short personal trial is the practical move. Try it for a week or two at a modest volume—loud isn't better and may be worse—and consider pink noise, the softer, lower-pitched variant that tends to outperform white noise in studies. Judge it honestly: if your sleep is no better, or feels lighter, drop it without hesitation. And don't let a sound machine substitute for the levers with real evidence—light, timing, and temperature—which address the internal drivers of sleep rather than just the soundscape.
From Nuvirox
Why we formulated Sleep+ Restore
A lot of sleep support comes down to a handful of ingredients that actually show up in the research — so that is what we built Sleep+ Restore around. Each two-capsule serving delivers 10 mg melatonin alongside vitamin B6, calcium, and magnesium, plus a 905 mg Sleep Formula blend of botanicals and amino acids.
That blend includes L-tryptophan, L-theanine, chamomile, lemon balm, passionflower, hops, GABA, L-theanine, ashwagandha, and 5-HTP — many of the same compounds discussed in this article. It is designed for healthy adults who want to support an occasional restless night, alongside the sleep habits the research keeps pointing back to. Backed by a 60-day money-back guarantee — long enough to actually evaluate it the way the research says you should.
Learn more about Sleep+ Restore →The bottom line
White noise is a low-risk experiment with a thin evidence base: it may help by masking disruptive sounds, particularly in noisy settings, but systematic reviews rate the quality of evidence as very low, and continuous noise may even trim deep sleep. Pink noise often does better. If you try it, keep the volume modest and judge it honestly—and don't let it crowd out the sleep habits with much stronger support.
References
- Riedy SM, Smith MG, Rocha S, Basner M. Noise as a sleep aid: A systematic review. Sleep Med Rev. 2021;55:101385. DOI: 10.1016/j.smrv.2020.101385.
- Capezuti E, Pain K, Alamag E, et al. Systematic review: auditory stimulation and sleep. J Clin Sleep Med. 2022;18(6):1697-1709. DOI: 10.5664/jcsm.9860.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.