White Noise for Babies: Does It Really Help Your Baby Sleep?

Quick answer: White noise does help many babies settle. In one study, 40% of babies fell asleep within five minutes with white noise playing, compared with 13% in a control group. Keep it at or below 50 decibels, place the sound source at least 2 metres from the cot and never inside it, and gradually reduce reliance as your baby grows.

What parents need to know

If you have spent weeks bouncing, rocking and shushing a baby who refuses to sleep, chances are someone has mentioned white noise. But does it actually work — and is it safe? Here is what the evidence says, and how to use it effectively.

What is white noise?

White noise is a consistent, steady sound that contains all frequencies at the same intensity, creating a calming shushing effect. It closely mimics the sounds babies heard in the womb — muffled voices, blood flowing, the constant hum of the outside world. For many babies, these familiar sounds are deeply soothing.

Why does white noise help some babies sleep?

Babies spend nine months in a surprisingly noisy environment — the womb is roughly as loud as a vacuum cleaner. When they arrive in the relative quiet of a bedroom, sudden sounds like a door closing or a dog barking can easily startle them awake. White noise helps by creating a consistent sonic environment that drowns out sudden noises, mimicking the womb, and acting as a sleep association cue that signals it is time to rest.

What does the research say?

A study published in the Archives of Disease in Childhood found that 40% of babies fell asleep within five minutes when white noise was played, compared to just 13% in a control group. Experts caution that volume matters and it should be used as a helpful tool rather than a permanent solution.

How to use white noise safely

The American Academy of Pediatrics recommends keeping white noise at or below 50 decibels — roughly as loud as a quiet conversation. Key guidelines:

• Place the sound source at least 2 metres away from the cot — never inside it
• Keep the volume low and consistent
• Aim to gradually reduce reliance on it as your baby grows older

Types of white noise

• Dedicated baby sound machines: Allow precise volume control and multiple sound options
• Apps: Convenient and often free — keep phones well away from the cot
• Fan sounds: Provide gentle background noise and can help regulate room temperature
• Pink or brown noise: Lower-frequency variants some babies prefer, available on most sound apps
• Shushing: The classic parental shush is itself white noise and highly effective for young babies

Is it safe for newborns?

Used correctly, yes. The NHS advises that sounds below 85 decibels are safe for prolonged exposure. A white noise machine set to conversational level and placed on a shelf — rather than next to your baby's ear — is well within safe limits.

Alternatives if white noise does not work

Not every baby responds to white noise. Try rainfall, ocean waves, gentle lullabies, heartbeat recordings, or the low hum of a tumble dryer. Combining sound with swaddling your baby in a soft, breathable Infatot muslin wrap can create that cocooned, womb-like feeling that helps many babies drift off.

Frequently asked questions

Is white noise safe for newborns?

Used correctly, yes. The NHS advises that sounds below 85 decibels are safe for prolonged exposure. A machine set to conversational level and placed on a shelf, rather than next to your baby's ear, is well within safe limits.

How loud should white noise be for a baby?

The American Academy of Pediatrics recommends keeping white noise at or below 50 decibels, roughly as loud as a quiet conversation. Keep the volume low and consistent.

Where should I put a white noise machine?

Place the sound source at least 2 metres away from the cot and never inside it. If you are using a phone app, keep the phone well away from the cot.

What can I try if white noise does not work?

Not every baby responds to white noise. Try rainfall, ocean waves, gentle lullabies, heartbeat recordings, or the low hum of a tumble dryer.