Best White Noise for Babies (and How Long to Use It)

White noise can be a parent's best friend at bedtime — it mimics the constant whoosh a baby heard in the womb and helps them settle. The keys are choosing the right kind of sound and using it at a safe volume and distance. Here's a practical, safety-first guide.

Why white noise helps babies sleep

The womb is a surprisingly loud place — a steady rush of blood flow and muffled sound. To a newborn, total silence can feel unfamiliar, while a soft, continuous “shhh” feels reassuring and familiar. White noise also masks household sounds — a doorbell, a sibling, the TV — that might otherwise startle a sleeping baby.

The best type of white noise for babies

Go for low, steady, and smooth rather than sharp or high-pitched:

• Shushing or fan-like hum — closest to womb sounds.
• Brown noise — deep and low, often more soothing than bright white noise.
• Steady rainfall — gentle and continuous.

Avoid sounds with sudden peaks or tinny high frequencies, which can be more alerting than calming.

Is white noise safe for babies?

Yes — with two simple rules around volume and distance:

• Keep it below ~50 decibels — about the level of a soft shower. If you have to raise your voice to talk over it, it's too loud.
• Place it at least ~2 metres (7 feet) from the crib — never right next to your baby's head.

A baby's hearing is still developing, so erring on the quieter side is always the safer choice.

How long should you use white noise for a baby?

Using it for the whole nap or night, while your baby is settling and sleeping, is widely considered fine when the volume is safe. Some parents use a timer so it fades once the baby is in deep sleep; others keep it on low all night to mask household noise. Either approach works — do what helps your baby sleep best.

What about hairdryer or vacuum sounds?

You'll see “hairdryer” and “vacuum” tracks recommended for fussy babies, and they can work because they resemble womb noise. The important rule: use a recording at a safe distance — never run an actual appliance near your baby.

This article is general information, not medical advice. If you have concerns about your baby's sleep or hearing, talk to your pediatrician.

LumaSleep includes gentle, baby-friendly sounds — soft shushing, brown noise, andsteady rain — with a fade-out timer, so you can settle your little one and let the sound ease off on its own.