Most people who struggle to fall asleep have tried the usual advice. Put the phone away, keep the room cool, stick to a schedule. All of that matters, but it doesn't always address the core problem: your brain won't quiet down. That's where sound comes in. The right audio can give your mind something to settle onto instead of spinning through thoughts, worries, and random to-do lists.
Not all sound works the same way though. Some methods are better for blocking out noise. Others aim to nudge your brainwave patterns toward sleep. Here are five approaches, what the research does and does not show for each, and practical tips on how to use them.
Does white noise help you fall asleep faster?
White noise can help you fall asleep faster in a noisy environment by masking sudden sounds. White noise spreads sound evenly across all hearable frequencies, so a door closing, a voice in the next room, or a car alarm outside is harder for the brain to pick out. Some people find it harsh and prefer brown or pink noise.
White noise is the classic starting point, and there's a reason it's still popular. It produces an even distribution of sound across all hearable frequencies, which makes it excellent at masking sudden noises like a door closing, someone talking in the next room, or a car alarm outside. Your brain can't easily pick out disruptions when they're buried under a consistent blanket of sound.
The often-quoted 38% figure comes from a small 2017 trial in Frontiers in Neurology (Messineo and colleagues). Eighteen healthy adults went to bed 90 minutes earlier than usual to mimic a night of trouble falling asleep, and broadband sound at about 46 dB cut the median time to reach stage 2 sleep by 38% compared with the room's normal background noise. The bigger picture is less clear-cut: a 2021 systematic review in Sleep Medicine Reviews (Riedy and colleagues) looked at 38 studies and rated the evidence that continuous noise improves sleep as very low quality.
The tricky part is that some people find pure white noise a bit harsh, especially at higher volumes. It has a lot of high-frequency energy, which can feel like a constant hiss. If that's you, try brown noise or pink noise instead. They have the same masking benefits but with a warmer, deeper character. We go into much more depth on the science and practical use of different noise types in our comprehensive breakdown of noise colors.
Best for
Apartments with thin walls, noisy roommates, street-facing bedrooms, or anywhere that sudden sounds tend to jolt you awake.
Pink noise as a softer mask
Pink noise is white noise's more refined sibling. It still covers a wide frequency range, but the higher frequencies are dialed down, giving it a softer, more natural feel. Think steady rainfall, wind through trees, or a waterfall in the distance.
What makes pink noise interesting is the sleep lab research behind it, though that research did not test the steady pink noise an app plays. In a 2017 Northwestern University study in Frontiers in Human Neuroscience (Papalambros and colleagues), 13 adults aged 60 to 84 heard short pink noise pulses timed by an EEG algorithm to the peaks of their slow brain waves. Slow-wave activity rose while the pulses played (though not across the night as a whole), and the overnight gain in word-pair recall was about three times larger than after a sham night.
For falling asleep faster specifically, pink noise works well because it's less aggressive than white noise while still providing good sound masking. If you're in a reasonably quiet room but your brain just won't stop running, pink noise gives it something gentle to rest on. Rain sounds are a great natural source of pink noise, and most people find them instinctively calming. The memory findings for pink noise come from those precisely timed pulses, so don't count on a memory bonus from steady playback.
Best for
People who want a gentler masking sound, or who find white noise too sharp.
Do binaural beats help you fall asleep?
Binaural beats may help some people fall asleep, and the research is mixed but promising. Binaural beats play a slightly different frequency in each ear, and the brain perceives a third beat at the difference. In the delta range (1 to 4 Hz), that beat is meant to encourage the slow brainwave patterns associated with deep sleep. Headphones are required.
This one works differently from noise-based methods. Binaural beats involve playing two slightly different frequencies in each ear. Your brain perceives a third "beat" at the difference between them. When that difference falls in the delta range (1 to 4 Hz), the idea is that your brain shifts toward the slow brainwave patterns associated with deep sleep.
The research here is mixed but promising. A 2023 systematic review in PLOS ONE (Ingendoh and colleagues) found five studies supporting brainwave entrainment, eight contradicting it, and one mixed. A 2019 meta-analysis in Psychological Research (Garcia-Argibay and colleagues) found a medium overall effect across studies of anxiety, pain, memory, and attention, though not of sleep itself. The effect isn't dramatic for everyone, but for people whose main barrier to sleep is anxiety or racing thoughts, binaural beats are a low-risk thing to try.
The catch is that binaural beats require headphones or earbuds to work properly, since each ear needs to receive a different frequency. Sleep headphones or thin earbuds designed for side sleepers make this more practical than it sounds. You can also layer binaural beats underneath other sounds like rain or pink noise, which gives you the masking benefits along with the beat. For the specific Hz ranges studied for deep sleep, see our writeup on the best binaural beat frequency for deep sleep.
Best for
Anxious sleepers, overthinkers, and anyone who wants a more targeted approach to sleep induction.
Layered soundscapes for immersion
Single sounds work, but layered soundscapes often work better. The idea is to combine multiple audio elements into something that feels rich and immersive enough to pull your attention completely away from whatever's keeping you awake.
A typical sleep soundscape might combine a base layer (like brown noise or steady rain), a mid-layer (like distant thunder or wind), and an optional entrainment layer (like low-frequency binaural beats). When the mix is right, it creates an environment your brain can settle into, almost like being wrapped in sound.
Many people with ADHD or busy minds say this approach suits them, though it has not been tested in trials. Single-note sounds often aren't engaging enough to compete with an active train of thought. But a multi-layered soundscape has enough texture and variation to hold attention gently without being stimulating. Your brain gets absorbed in the sound instead of rehashing the day.
The key is balance. Too many layers or too much variation, and it becomes stimulating rather than calming. Start with two layers and add more only if needed. And keep the overall volume moderate: our volume guide recommends 50 to 70 dB at the pillow for adults, with about 60 dB (a normal conversation) as a comfortable middle and 70 dB as the ceiling.
Best for
People with active minds, ADHD, or anyone who finds single sounds too boring to block out their thoughts.
Sleep timers and gradual fade-outs
This isn't a sound type so much as a technique, but it matters more than most people realize. Playing sound all night long isn't necessarily better. The 2021 Sleep Medicine Reviews review cautioned that continuous noise may also disturb sleep and hearing, and a 2026 sleep lab study in Sleep (Basner and colleagues, University of Pennsylvania) found that all-night pink noise reduced REM sleep compared with quiet nights. REM is the stage linked to emotional processing and some kinds of memory.
A smarter approach is to use a sleep timer. Set it for 30 to 60 minutes, long enough to get you through the falling-asleep phase, and then let it fade out gradually. The fade is important. An abrupt cutoff can actually wake you up if your brain notices the sudden change. A slow fade over a few minutes lets your brain transition naturally from sound-assisted sleep to silence.
This approach also helps prevent sound dependency, where you eventually can't fall asleep without your noise machine running. Using a timer means sound is a tool for the transition into sleep, not a crutch you rely on all night.
Best for
Everyone. Regardless of which sound method you use, a sleep timer with a gradual fade limits how much of the night you spend under sound.
What is the best sound setup for falling asleep faster?
The most effective sound setup for falling asleep faster often combines several methods. Choose a base sound that fits the room (white or brown noise for noisy rooms, pink noise or rain for quieter ones), add low-frequency binaural beats if racing thoughts are the main problem, keep the volume moderate, and use the same setup every night.
You don't have to pick just one method. The most effective sleep sound setup often combines several. Here's a practical starting point:
- Choose a base sound that matches your environment. White or brown noise for noisy rooms. Pink noise or rain sounds for quieter ones.
- If racing thoughts are your main problem, layer in low-frequency binaural beats underneath.
- Set a sleep timer for 30 to 45 minutes with a gradual fade.
- Keep the volume between 50 and 70 dB at your pillow, toward the lower end if the room is quiet. Loud enough to mask, quiet enough to be background.
- Be consistent. Use the same setup every night so your brain starts associating those sounds with sleep. After a couple of weeks, the sound itself becomes a sleep cue as part of your bedtime routine.
How IOn Sleep handles this
IOn Sleep was built around this exact approach. You can layer up to three noise colors and nature sounds, adjust the volume of each layer independently, use delta, theta, or alpha binaural beat modes, and set a sleep timer that fades the sound out. It's designed to give you the flexibility to build a soundscape that works for your specific sleep challenges rather than forcing you into a preset that might not fit.
If you're not sure where to start, our piece on white noise and binaural beats covers that pairing. After that, experiment with layers until you find the mix that settles you fastest.
The bottom line
Falling asleep faster isn't about finding some magic sound. It's about understanding why your brain is staying awake and choosing the audio method that addresses that specific problem. Noise keeping you up? White or brown noise. Brain too active? Binaural beats or layered soundscapes. Want the best of both worlds? Layer them together with a sleep timer.
Sound won't replace good sleep hygiene. But it fills a gap that no amount of good habits can fully close on their own. Sometimes your brain just needs something to land on. Give it the right sound, and it'll do the rest.
This post is part of our sleep guides.