Brown Noise for Sleep: How to Use a Sleep Timer That Fades Out

Brown noise has become one of the most popular sleep sounds around. It’s deep, soft and easy to forget. But there is a common problem: you fall asleep to it, it stops at some point in the night, and the sudden quiet wakes you up. Here is how to set it up properly.

Why people sleep to brown noise

Brown noise puts most of its energy in the low frequencies. It sounds like a distant waterfall or the rumble inside an airplane cabin, with much less of the hiss you hear in white noise. At night, that softness matters.

Steady noise also masks sudden sounds. A car door or a neighbor’s footsteps stand out sharply against silence. Against a steady rumble, they blend in.

What the research says

The honest answer is that the evidence is thin. A 2021 systematic review from the University of Pennsylvania looked at 38 studies of continuous noise and sleep. The results varied widely, some studies found it helped, others that it disrupted sleep, and the overall quality of evidence was rated very low. The authors also noted possible downsides for sleep and hearing.

Separately, researchers have experimented with short bursts of pink noise timed to deep-sleep brain waves, which is a different, lab-based technique from playing noise all night.

So brown noise for sleep is a comfort tool. It works well for many people, and there’s no good reason to expect it to work for everyone.

All night, or a timer?

Two good approaches:

All night, low volume. Best if your room has unpredictable noise all night, like traffic, a snoring partner or thin walls. The steady sound keeps masking.

A timer with a slow fade-out. Best if you only need help falling asleep. The sound plays for, say, 45 minutes and then fades over the last stretch. The change is too gradual to notice, so you don’t wake to sudden silence.

What doesn’t work well: sound that stops abruptly. That’s the 3 a.m. wake-up.

Five tips for sleeping with brown noise

1. Keep it quiet. Lower than you think, about conversation level or softer.
2. Move the phone away from your pillow. A bedside table is enough.
3. Add a gentle layer. Soft rain or distant thunder over brown noise feels more natural than noise alone.
4. Use the same sound every night. It becomes a cue that it’s time to sleep.
5. Wind down first. A short theta or delta preset, or a singing bowl, can mark the transition. See which binaural beat for sleep.

How to set it up in Solbox

1. Pick brown noise from the carousel (it’s free).
2. Add a layer like Soft Rain Atmosphere or Distant Thunder.
3. Tap the timer, choose Sleep, and set up to 8 hours 55 minutes.
4. Lock your phone. Solbox keeps playing in the background and fades out when the timer ends.

More mixes and every soundscape are on the sleep sounds page. If you’re choosing between colors, read white vs pink vs brown noise.