Brown noise is the deepest of the noise colors: a low, steady rumble that sounds more like a far-off waterfall than a hiss. If your feed has been full of parents swearing by it, you’re not imagining the trend. The honest picture is simpler, though. Brown noise is a gentle, reasonable option, but there’s no strong research showing it beats other sounds for babies. If you want the side-by-side version, read our pink vs white vs brown noise comparison.

This page is part of our guide to baby sleep sounds. Before you try any noise color, it’s worth knowing how loud white noise should be, because the same limits apply to brown noise.

What is brown noise?

Brown noise is a steady sound with most of its energy in the low frequencies, so it sounds deep and rumbly rather than bright. It’s also called red or Brownian noise, after Brownian motion, the random drift of tiny particles that its signal resembles.

Noise colorSounds likeCharacter
WhiteRadio static, a steady shhhBright, strong masking
PinkSteady rainSofter, balanced
BrownA distant waterfall, far-off thunder, a low engine humDeep, rumbly, very soft highs

Real previews from the app. Play them softly.

There’s no brown noise clip on this page yet. Ocean waves, above, share its deep, low character.

If you’d like something between white and brown, pink noise for babies sits in the middle.

Brown noise took off on social media, mostly through adults who said it helped them relax, focus or fall asleep. Parents then started trying it at bedtime. That’s a perfectly good reason to experiment, but it’s worth remembering that the buzz is based on preference, not studies in babies.

Is brown noise good for babies?

Brown noise can be a good fit for some babies, as long as it’s quiet and well away from the crib. Many parents find its lower pitch less harsh than white noise at the same volume, which makes it easier to keep it soft.

It may suit:

  • Babies who startle at higher-pitched sounds or seem unsettled by a bright hiss.
  • Older babies and toddlers who’ve outgrown womb-like sounds but still benefit from a steady background.
  • Noisy homes: deep sound is good at covering low rumbles like traffic, a washing machine or footsteps upstairs.
  • Parents sharing the room. Many adults simply find brown noise easier to listen to all night.

For newborns, womb sounds, shushing and white noise are often the first things parents try, but a soft brown noise is fine to experiment with too.

Brown noise vs white noise for babies

White noise has more energy in the high frequencies, so it masks sharp sounds like a dog bark or a clattering pan very well. Brown noise is better at blending with low sounds and is gentler on the ear. Neither is “right”. Try one for a few nights, then the other, and keep the one your baby settles to at the lowest volume. Our flagship guide to white noise for babies covers the research and setup in detail.

How to play brown noise safely

A soft, deep rumble is easy to nudge louder night after night, so check the level rather than guessing. Keep it at about 50 dB or lower at your baby’s ear, around the level of a quiet conversation. Researchers who measured infant sleep machines found that at maximum volume, some could reach levels that may be risky for hearing over long periods (Hugh et al., 2014). For a fuller answer, read is white noise safe for babies.

Brown noise mixes to try

Brown noise pairs naturally with water sounds. In Baby Mantra you can play up to three sounds at once with separate volume controls:

  1. Brown noise + ocean waves: a deep, slow background. Pair it with our ocean sounds for baby sleep.
  2. Brown noise + waterfall: a constant, rushing rumble for noisy streets.
  3. Brown noise + rain on roof: cozy and low, with a little texture on top.

Save your favorite as a mix and start it with one tap tomorrow night. Add a sleep timer from 15 minutes to 2 hours with a gentle fade-out, or keep a very soft sound playing all night with the screen dimmed. It all works offline. You can see every feature of the Baby Mantra sleep app.

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