At night the enemy is contrast: the quiet broken by a car, a creak, a partner turning over. A soft, continuous sound can smooth those edges, though, honestly, the science here is more mixed than most sleep apps let on. What's clear is that it shouldn't need to run all night, which is what the fade-out timer is for.
What the evidence actually says
The popular idea is that steady sound covers the sudden noises that fragment sleep, and there's something to it, a small study of people in a very noisy environment found a white-noise device reduced night-time waking. But the most careful overview is cautious: a 2021 systematic review rated the overall evidence that continuous noise improves sleep as very low quality, and noted it may even disturb sleep for some people.
So treat sleep sound as a personal experiment, not a guarantee. If it helps you, keep it low; if it doesn't, don't force it.
Set it to fade, not to run all night
You don't need sound playing until morning, and given the mixed evidence, there's little reason to. A timer that fades the atmosphere out over the last minutes lets it carry you to sleep and then step back, so it doesn't shape your lighter sleep later in the night.
How to use it
- Use the sleep timer, 30 to 60 minutes with a soft fade-out.
- Keep the master volume low; sleep sound should be barely there.
- Rain, ocean and fire are the gentlest starting points.
Frequently asked questions
What are the best sounds for sleep?+
If sound helps you, soft and continuous is the way to go: rain, ocean, fire, wind or low ambient. Atmospheres like Fireplace, Ocean Sunset and Mountain Cabin work well. Keep the volume low and set the fade-out timer, and know the evidence that any of this improves sleep is mixed, so let your own experience decide.
Should sleep sounds play all night?+
Usually no. Many people prefer a timer that fades out after they fall asleep, so sound doesn't affect the lighter stages later in the night. Scenara's timer fades the whole atmosphere out gently.
Is rain or white noise better for sleeping?+
Both aim to mask interrupting sounds. Rain and ocean are softer and less harsh than pure white noise for most people, which is why they're such common sleep choices. The overall evidence is mixed, so try them low and see which, if either, you stop noticing.