White Noise for Newborns: Setup, Safety and What to Expect

In the womb, a baby hears a constant sound environment — blood flow, the mother's heartbeat, and ambient body noise — at levels roughly equivalent to a vacuum cleaner. That is much louder than we usually associate with a "peaceful" environment. This helps explain why many newborns respond well to white noise: it resembles what they were used to before birth.

However, this womb-sound comparison is also sometimes misused to justify using white noise too loudly. The womb's sound level was appropriate for a developing fetus — it is not a target for nursery use. The goal with white noise for newborns is much softer than womb levels, and placement matters considerably.

For a comprehensive guide that covers older babies and general safety guidelines, see our main guide on white noise for babies.

Why white noise can help newborns settle

Newborns have limited ability to filter out stimulation. An environment that is too visually or aurally busy can make settling harder, not easier. A steady, neutral background sound — like white noise or pink noise — can serve as a kind of acoustic anchor that prevents the nursery from feeling too stimulating while also masking household noise that might startle the baby.

For parents, white noise also helps mask their own nighttime movements during feeds and nappy changes — which can help the baby return to sleep more easily after a necessary waking.

The critical rule: volume limits

This is where parents most often get it wrong. The general guideline from pediatric hearing specialists is that nursery sound machines should not exceed 50 decibels at the location of the infant — roughly the level of quiet conversation at the same distance. This is considerably quieter than you might expect.

The practical way to estimate this: if you need to raise your voice to talk normally while the white noise is playing at normal sleep distance from the baby, it is too loud. Turn it down until normal conversation is comfortable at the same volume.

Speaker distance from the baby

The speaker or phone should never be placed in the cot or right next to the baby's head. A safe starting distance is at least a metre (three feet) away — ideally across the room or on a dresser at some distance. Sound intensity decreases with distance, so placing the sound source further away allows you to set a higher device volume while still having a moderate level reach the baby.

Placing a device close to the baby's head — even at a low device volume — can result in the baby receiving a much higher effective sound level than you intend. Distance is one of the easiest safety controls to get right.

All night or just for settling?

Both approaches work for different families. Running white noise all night can provide consistent masking of household noise throughout the night, which often helps with both falling asleep and staying asleep between sleep cycles. Using it only for settling and then fading it out is also used by parents who prefer not to run it all night.

There is no strong evidence that running white noise all night is harmful when the volume is appropriate. If you choose to use it all night, the volume guideline above applies throughout — not just at the start of the night.

Which sound to use

White noise: the standard starting point

True white noise works well for newborns because its broad spectrum covers the range of household noise that might otherwise disturb the baby. It is also what most research on infant sound machines references.

Pink noise: a softer option

Pink noise — with its lower-weighted spectrum — often sounds warmer and less harsh than white noise. Many parents find it more comfortable to have playing through the night, and some newborns seem to settle equally well with it. Our guide to what pink noise is explains the difference clearly.

Avoid highly variable sounds

Heartbeat sounds, lullabies, or recordings with variable volume can become less predictable for a settling baby. Steady, consistent sounds are generally more effective for maintaining sleep than sounds that change.

The right white noise level for a newborn is considerably quieter than most parents start at. If in doubt, turn it down.

Practical setup checklist

1. Place the speaker or phone at least a metre away from the cot — ideally on a dresser or shelf across the room.
2. Set the volume so normal conversation is possible without raising your voice.
3. Use a steady sound — white noise or pink noise rather than variable or layered sounds.
4. If using a sleep timer, set it to run through the full sleep period rather than turning off early.
5. Check the volume level again after a few nights — it is easy to gradually increase it without noticing.

When white noise may not be enough

White noise is a useful tool but not a solution to all newborn sleep challenges. Hunger, temperature, discomfort, and the need for physical contact are all factors that white noise does not address. If the baby is not settling despite an appropriate sound environment, check those first before assuming the sound needs adjustment.