White noise for adult sleep
For adults, steady sound is mostly about masking: covering the snoring, traffic and neighbours that pull you out of sleep. Here is how to use it well, and what the research does and does not show.
Short answer: white noise helps adults sleep mainly by masking sudden sounds like snoring, traffic and neighbours. Many people prefer deeper brown or pink noise at night. The evidence is promising in noisy environments but still limited, so try it for a week at a moderate volume and see how you sleep.
How masking works
You rarely wake because a room is loud. You wake because the sound changes: a car door after silence, a partner's snore, a lift in the hallway. A steady sound raises the background level, so those changes are smaller relative to it and less likely to reach your attention. That is why fans, air conditioners and rain have long been informal sleep aids.
What the research says
- In a noisy city, it helped. Ten adults living in a high-noise area of New York City slept with and without a white noise machine over several weeks. With white noise, they took less time to fall asleep (by sleep diary) and spent less time awake during the night (by wrist sensor). It was a small study without a separate control group. (Ebben, Yan and Krieger, Sleep Medicine, 2021.)
- Overall evidence is weak. A 2021 systematic review of 38 studies found some evidence that continuous noise shortens the time to fall asleep, but rated the overall quality of evidence as very low and noted that some studies found noise disturbed sleep. (Riedy et al., Sleep Medicine Reviews, 2021.)
- Pink noise and deep sleep in the lab. Researchers have boosted deep, slow-wave sleep by playing short bursts of pink noise timed precisely to brain waves, in young adults and in adults aged 60 to 84. These are lab methods that track brain activity, not continuous background sound, so they do not prove that a pink noise track deepens sleep. (Ngo et al., Neuron, 2013; Papalambros et al., Frontiers in Human Neuroscience, 2017.)
Which sound for which problem
| Problem | Try | Why |
|---|---|---|
| Partner snoring | Brown noise, Fan, Air Conditioner | Low, rumbly sounds cover low-pitched snoring. |
| Traffic or city noise | Brown noise, Rain on Roof, Waterfall | Broad, steady sound with plenty of bass. |
| Neighbours, doors, voices | Pink noise, Rain, Fan | Covers the speech range without sounding harsh. |
| Racing thoughts | Ocean, Rain, Fireplace | Gentle, slowly changing textures give the mind something calm to follow. |
| Waking at 3 a.m. | Your usual sound, kept on all night at low volume | Familiar sound helps you settle back down. |
| Shift work and daytime sleep | Brown noise with Rain layered on top | Masks daytime household and street noise. |
Setting it up in HushNest
- Pick a sound, or layer up to four (for example, brown noise under soft rain) and save the mix.
- Set a sleep timer from 15 minutes to 2 hours, or play until morning. Timers fade out slowly instead of cutting off, which avoids the sudden silence that can wake you.
- Turn on bedtime appearance so the app goes dark in the evening, and use Dim screen while sound plays.
- Sounds play offline and with the screen locked, so they work on flights, in hotels and anywhere without signal.
Keep the volume moderate. The WHO's night noise guideline for Europe sets an outdoor night-time target of 40 dB, a reminder that quieter nights are healthier; your sound only needs to be loud enough to blur the noises that wake you.
Sources
- 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. doi:10.1016/j.sleep.2021.03.031
- 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
- Ngo HV, Martinetz T, Born J, Mölle M. Auditory closed-loop stimulation of the sleep slow oscillation enhances memory. Neuron. 2013;78(3):545-553. doi:10.1016/j.neuron.2013.03.006
- Papalambros NA, Santostasi G, Malkani RG, et al. Acoustic enhancement of sleep slow oscillations and concomitant memory improvement in older adults. Front Hum Neurosci. 2017;11:109. doi:10.3389/fnhum.2017.00109
- World Health Organization Regional Office for Europe. Night noise guidelines for Europe. 2009.
- NHS. Tinnitus: treatment. American Tinnitus Association. Sound therapy.
Questions people ask
Does white noise really help adults sleep?
It can, especially in noisy places. A small 2021 study of adults in a loud part of New York City found white noise shortened time to fall asleep and reduced time awake during the night. A 2021 review of 38 studies, however, rated the overall evidence as very low quality, so treat it as something to try rather than a guaranteed fix.
Is brown noise better than white noise for sleep?
Many adults find brown noise more pleasant at night because it is deep and rumbly rather than hissy, and it covers low sounds like traffic and snoring well. There is no strong evidence that one colour beats another; pick the one you can listen to comfortably.
Can white noise block out snoring?
It cannot cancel snoring, but a steady sound at a similar loudness makes it less noticeable, so it is less likely to wake you. Brown noise or a fan often works well because snoring is low-pitched. Earplugs plus quiet noise is a common combination.
Should I play white noise all night?
That is up to you. Some people use a timer and fall asleep before it fades; others play quiet sound all night so a 3 a.m. noise does not wake them. Keep the volume moderate either way to protect your hearing.
Can white noise help with tinnitus at night?
Some people find that background sound makes tinnitus less noticeable at bedtime; the NHS and the American Tinnitus Association both describe sound therapy as a way to manage it. Speak to a doctor or audiologist about tinnitus, especially if it is new or one-sided.
Try HushNest tonight
Free on Android and iPhone, with no account needed. On the App Store it is listed as HushBaby: Baby Sleep Sounds.
