Is it safe to sleep with white noise every night?

For most adults, sleeping with white noise every night is unlikely to harm your hearing, as long as the volume is low. The levels linked to hearing damage are far louder than what you need to cover a snoring partner or street noise. The less settled question is whether all-night noise is good for your sleep itself: the evidence is weak, and one recent lab study found that continuous noise reduced REM sleep.

So the practical answer is: yes, it’s generally fine, if you keep it as quiet as still works, put the speaker away from your head, and consider a sleep timer instead of running it until morning. The rest of this article explains the numbers behind that advice and how to check your own setup with a phone.

How loud is too loud

Two different kinds of limits are relevant here: limits that protect your hearing, and limits that protect your sleep. They are very far apart.

Hearing limits

The US National Institute on Deafness and Other Communication Disorders (NIDCD) says that sounds at or below 70 dBA are unlikely to cause hearing loss even after long exposure, while long or repeated exposure to sounds at or above 85 dBA can cause hearing loss.

Workplace rules use similar numbers. NIOSH, the US occupational health research agency, recommends limiting noise to 85 dBA averaged over an 8-hour workday. OSHA’s legally enforceable limit is 90 dBA over 8 hours. The WHO’s safe listening guidance for personal audio puts it in weekly terms: 80 dB is safe for up to 40 hours a week, while at 90 dB the safe time drops to 4 hours a week.

These limits were designed for workdays and listening sessions, not for 8 hours of sound every night, seven nights a week. A week of nights adds up to around 56 hours, more than the WHO’s 40-hour budget at 80 dB. That is one more reason to stay well below these levels at night, not right at them.

Sleep limits

Sleep is disturbed at much lower levels than hearing is damaged. The WHO’s 1999 Guidelines for Community Noise say that for a good night’s sleep, continuous background noise indoors should not exceed 30 dB(A), with individual noise events kept below about 45 dB(A). For noise with a lot of low-frequency content, the WHO recommends an even lower value.

Those numbers are about unwanted noise, like traffic or a neighbor’s ventilation unit, not a sound you choose. Your brain keeps processing sound during sleep even when you picked the sound yourself, so they are a useful reminder that “loud enough to notice” is already loud for a bedroom.

What the numbers mean in practice

Level	Everyday example (WHO)	What it means at night
30 dB	Soft whispering	WHO’s benchmark for continuous bedroom noise
40 dB	A library	Quiet sleep sound; often enough in a quiet room
60 dB	Normal conversation	Loud for a bedroom; louder than sleep studies used
80 dB	A doorbell	WHO safe-listening limit is 40 h per week
85 dB	Heavy traffic inside a car	Long or repeated exposure can damage hearing

A practical target: as low as still covers the sound that bothers you, measured at your pillow. In a recent sleep lab study (more on it below), continuous noise was played at 40 and 50 dBA. If your setup reads well above that at your head, it’s worth turning down.

How to check the volume with your phone

You don’t need special equipment for a rough check. On iPhone, NIOSH offers a free app called NIOSH Sound Level Meter. NIOSH reports that it is accurate within about ±2 dBA when tested in its acoustics lab, though it is not a replacement for a professional meter, and an external calibrated microphone improves accuracy. There is no Android version: NIOSH says it can’t verify accuracy across the many different Android microphones. Android sound meter apps exist, but treat their readings as approximate.

To measure:

1. Start your sleep sound at your usual volume and position.
2. Put the phone with the meter where your head would be, microphone facing up, not right against the speaker.
3. Use A-weighting (dBA) and watch the average reading (often labeled LAeq) for a minute rather than the jumping instant value.
4. Turn the sound down until the noise that bothers you is just covered, then measure again. That is usually lower than people expect.

Distance makes a big difference. Moving a speaker from beside your pillow to the other side of the room lowers the level at your ears noticeably, so placement is the easiest fix if a reading is high.

What the research says about sleeping with noise every night

The research on continuous noise as a sleep aid is thinner than its popularity suggests.

A 2021 systematic review in Sleep Medicine Reviews (Riedy and colleagues, University of Pennsylvania) included 38 studies on continuous white or broadband noise and sleep. The studies varied widely in noise type, volume and measurement, and their results ranged from improved to disrupted sleep. The authors rated the evidence that continuous noise improves sleep as very low quality and wrote that more research is needed before it is promoted as a sleep aid, especially since it may also affect sleep and hearing.

A 2022 systematic review in the Journal of Clinical Sleep Medicine (Capezuti and colleagues, 34 studies) also found no strong evidence for white or pink noise as a sleep aid, but noted that none of the studies reported adverse effects from short-term use.

The most careful recent test is a 2026 study in Sleep by Basner and colleagues. Twenty-five healthy young adults spent seven nights in a sleep lab with full polysomnography. Continuous pink noise at 40 or 50 dBA reduced REM sleep compared with a quiet night, and adding it to traffic and aircraft noise made overall sleep structure worse, despite small improvements in noise-related awakenings. Foam earplugs worked better. Hearing tests the next morning were not affected. The authors cautioned against widespread, indiscriminate use of broadband noise and called for research on long-term use.

The study is small and short, and pink noise isn’t identical to white noise. But it is the best data we have on the question, and it points toward using less noise rather than more. For how the noise colors compare, see white noise vs pink noise vs brown noise.

Concerns about the brain and auditory processing

You may have seen headlines that white noise is “bad for your brain.” These mostly trace back to a 2018 review in JAMA Otolaryngology–Head & Neck Surgery by Attarha, Bigelow and Merzenich. The authors argued that long exposure to unstructured noise, even at non-damaging levels, could cause unhelpful changes in how the brain processes sound, and that white noise should be avoided as a tinnitus treatment.

This is a hypothesis built largely on animal research, not a finding from studies of people sleeping with noise. Two of the authors are affiliated with Posit Science, a company that develops brain-training software. The American Academy of Audiology responded that the evidence for harm to central auditory function comes mainly from rodent experiments and doesn’t match how sound therapy is used in clinics. It’s a reasonable reason to keep the volume low, not proof of harm.

Children are a separate case. A 2014 study in Pediatrics measured 14 infant sleep machines at maximum volume: all exceeded 50 dBA at 30 cm, the recommended limit for hospital nurseries, and three exceeded 85 dBA. If you use noise for a baby, read our guide to white noise for babies.

Can you become dependent on white noise

There is no good research on dependence. What does happen is habit: after months of falling asleep to the same sound, silence can feel strange, and a hotel room without your sound may be harder.

That isn’t harmful in itself, and many people simply bring their sound along. If it bothers you, a few things help: keep the volume low so the contrast with silence is small, use a timer so the sound only covers falling asleep, and now and then try a night without it.

Phone speaker, speaker across the room, or headphones

A speaker a few feet from the bed is the simplest setup. The sound reaches both ears evenly, it is easy to measure, and nothing presses on your ears.

A phone on the nightstand works too, with two caveats: put it in Do Not Disturb or airplane mode so notifications don’t wake you, and don’t leave it under your pillow while charging. Phone speakers also reproduce very little bass, so deep sounds like brown noise come across thinner.

Earbuds and headphones are the riskiest option for volume. They send sound straight into the ear canal, you can’t easily measure the level, and the NIDCD lists headphones at maximum volume among sounds in the 94 to 110 dBA range. If you need them (a shared room, a snoring partner), use soft sleep headphones or a headband, keep the volume low, and use a timer. If your ears feel sore, itchy or blocked in the morning, take a break and switch to a speaker.

Should you turn white noise off: timer or all night

There is no research comparing the two, so this is a trade-off rather than a rule.

A sleep timer limits total exposure, which fits the cautious reading of the Basner study, and covers the part of the night when most people need help: falling asleep. A fade-out helps here, because an abrupt switch from sound to silence is itself a change your ears can notice. In Noctune (coming soon to iPhone and Android), the timer runs from 5 minutes to 10 hours (or until a time you choose), the sound fades out slowly over the last tenth of the timer, and a maximum-volume setting caps how loud any mix can get.

Playing all night makes sense if the noises that wake you happen later: an early garbage truck, a partner’s alarm, a neighbor coming home at 3 a.m. In that case the steady background reduces how much those sounds stand out.

A reasonable approach is to start with a timer of 30 to 60 minutes. If you keep waking from noises later in the night, try a longer timer or all night at a lower volume.

When to see a professional

See a doctor or an audiologist if you notice ringing, muffled hearing or ear pain after nights with noise; if you have new or one-sided tinnitus (see sounds for tinnitus); or if you find you can’t sleep without louder and louder sound. Ongoing insomnia, or a partner who snores loudly and stops breathing at night, also deserve a proper evaluation rather than a louder sound machine.