Brown Noise for Babies: Does It Work Better Than White Noise?

White noise has been the default recommendation for baby sleep for decades. It's in every sleep training book, recommended by paediatricians, and backed by a solid pile of research. So why are more parents reaching for brown noise instead?

The short answer: some babies just seem to settle better with it. And when you're up at 2am with a baby who won't sleep, you try things.

Why brown noise might work for some babies

The traditional argument for white noise is that it resembles the womb — a constant, slightly noisy environment (louder than most people expect, actually closer to 70–80dB in utero). White noise covers that broadband character well.

Brown noise is deeper and warmer. Where white noise has a bright, crisp quality, brown noise rumbles — like a long car journey, a tumble dryer, or standing near a waterfall. Some parents find this settles certain babies more quickly, particularly those who respond well to being in a moving car or pram.

There's no direct head-to-head research on white vs brown noise for infant sleep — the baby sleep research base overwhelmingly uses white noise. But the mechanism is plausible: some babies may find the lower-frequency character of brown noise less stimulating and easier to relax into.

Play brown noise → · Play white noise →

Safety first — the rules are the same as white noise

Whether you use white or brown noise, the safety guidelines are identical and worth taking seriously:

Volume: below 50dB at the baby's ear level. This is roughly "quiet conversation" volume. Download a free decibel meter app and check — you might be surprised. Many popular machines can exceed 85dB at close range on full volume, which is genuinely too loud for prolonged exposure.

Distance: at least 200cm from the crib. Not clipped to the crib rail, not sitting on the mattress beside them — across the room. This isn't excessive caution; it's specifically what the American Academy of Pediatrics recommends.

Don't use your phone at maximum volume right next to them. Again — measure it. What sounds moderate to your adult ears in a noisy moment can be too loud for an infant.

How to actually try it

The easiest approach is to play brown noise in a browser tab on a device positioned safely across the room. This costs nothing and lets you test whether your baby responds to it before investing in hardware.

If it seems to help, you can either continue using it this way or look at a dedicated machine. The LectroFan is the most versatile — it has both white and brown noise modes, which lets you switch if you find one works better than the other on different nights.

White noise vs brown noise — which should you start with?

For newborns, I'd still start with white noise. It has the most research, the most practitioner backing, and the most predictable behaviour. If your baby settles well with it, there's no reason to change.

Brown noise is worth trying if:

• White noise doesn't seem to be settling them particularly well
• Your baby responds well to low-frequency environments like cars or prams
• You want a warmer sound for the bedroom (some parents find white noise harsher to live with overnight)

Most babies who respond to noise at all will respond to either. The differences between them are subtle enough that your baby's individual preference — if they show one — is the best guide.

One more thing

Whatever noise you use, consistency matters. Pick one and use it every sleep, not occasionally. Babies learn sleep associations, and the more reliably the noise appears at sleep time, the more strongly it becomes a cue for sleep itself. That association — noise → sleep — is actually one of the most useful things you're building in those early months.

Read: white noise for babies — the complete guide → · Play brown noise → · Play white noise →