Sound for Baby Sleep

White Noise for Baby Sleep

Updated July 5, 2026

General guidance on using gentle white noise as part of a baby's bedtime routine — volume, distance, and duration — alongside a link to AAP safe-sleep resources.

Why Families Use White Noise for Baby Sleep

Continuous, even background sound is one of the most common tools parents reach for during the newborn and infant stage. The idea is simple: a steady sound can mask sudden household noises that might otherwise wake a light sleeper, and it can help create a consistent bedtime cue as part of a wind-down routine.

This page focuses specifically on the sound itself — what it is, how loud it should be, and where to place it. It is not a substitute for your pediatrician's or the American Academy of Pediatrics' safe-sleep guidance, which covers the full sleep environment: a firm, flat surface, no loose bedding, blankets, or soft toys in the crib, and always placing baby on their back to sleep.

~50 dBcommonly cited maximum volume near the crib
2 m / 7 ftcommonly cited minimum distance from the crib
Never insidekeep any sound device outside the crib itself

Volume & Placement Guidance

Volume

Keep the sound at a low, conversational volume — check with a smartphone sound-meter app if you're unsure. Louder is not better; the goal is a gentle, steady backdrop, not something that itself competes for attention.

Distance

Place any sound source (phone, speaker, or dedicated sound machine) at least 2 metres (about 7 feet) away from the crib, and never place a device, speaker, or its cord inside the crib.

Duration

Some families use a timer so sound plays only during the settling-down window; others run it throughout the night at low volume. Both are common practices — choose what works for your family and revisit as your baby grows.

When to Ask Your Pediatrician

If you have any specific concerns about your baby's hearing, sleep environment, or sleep patterns, your pediatrician is the right person to ask — this page is general information, not a personalised recommendation.

💡 Tip: Try white noise at ~35% as a gentle starting volume, and use the built-in sleep timer if you'd rather the sound fade out automatically than run all night.

About the Author

ASMR Sanctuary Wellness Team — a small editorial group summarising publicly available pediatric sleep-environment guidance. Last reviewed:

Sources & Further Reading

This article is for general educational purposes only and is not medical advice. Always follow your pediatrician's guidance and the full AAP safe-sleep recommendations for your baby's sleep environment.

Not medical advice. This page covers ambient sound only. Always follow your pediatrician's guidance and the full AAP safe-sleep recommendations for your baby's sleep surface, bedding, and room — sound is one small, optional part of a bedtime routine, not a safe-sleep requirement.

Frequently Asked Questions

Is white noise safe for baby sleep?
Many families use white noise as part of a bedtime routine, and general guidance (including from the American Academy of Pediatrics) focuses on two safety factors: keep the volume low — no louder than a quiet shower — and keep the device at a safe distance from the crib, not directly inside or attached to it. This page is about the sound itself; always follow your pediatrician's and the AAP's full safe-sleep guidance for the sleep environment as a whole (firm flat surface, no loose bedding or soft objects, back sleeping).
How loud should white noise be for a baby?
A commonly cited guideline is to keep sound at or below roughly 50 dB at the position of the baby's ears — about the loudness of a quiet conversation — and to place the sound source at least 2 metres (about 7 feet) from the crib, never inside it. A smartphone sound-meter app can help you check.
Should white noise play all night?
Practices vary by family. Some use a timer so the sound runs during the falling-asleep window rather than continuously; others let it run throughout the night at a low volume. There's no single universal answer — this app's sleep timer can be set for shorter windows if you prefer not to run sound all night.
Why does white noise seem to help some babies fall asleep?
One common explanation is that white noise masks sudden household sounds (doors, siblings, traffic) that might otherwise wake or startle a light sleeper, and that continuous sound can echo the constant background noise babies experienced in utero. This is a widely observed pattern rather than a guaranteed effect — some babies sleep just as well, or better, without any added sound.
What's the difference between white noise, pink noise, and womb sounds for babies?
White noise has equal energy across all audible frequencies (a bright, even hiss). Pink and brown noise emphasise lower frequencies and sound warmer or deeper. 'Womb sound' style audio typically layers a low rhythmic pulse (echoing a heartbeat) under continuous whooshing noise, aiming to resemble the in-utero acoustic environment. See our companion page: Womb Sounds for Newborns.
Can white noise cause hearing damage in infants?
At a safe, low volume and safe distance, general guidance does not suggest a hearing-damage risk from ambient white noise. Damage risk relates to volume and proximity, not the specific choice of sound — the same safety principle (low volume, safe distance, not attached to the crib) applies to any sound source in a nursery.
Is this app's white noise a real recording?
No — the sound is synthesised live in your browser using the Web Audio API. It loops seamlessly with no fixed duration, no file to download, and no buffering, which makes it convenient for an unpredictable bedtime or nap.
Can I use a sleep timer instead of playing sound all night?
Yes — our Sound Mixer includes a sleep timer (15 minutes up to 2 hours) so you can let the sound run during the settling-down period and fade out automatically rather than playing indefinitely.
Does this replace safe-sleep guidance from my pediatrician?
No. This page is only about the sound itself. Please follow the AAP's full safe-sleep recommendations for the crib, sleep surface, and room, and always ask your pediatrician about anything specific to your baby.
What sound should I try first?
Plain white noise or gentle rain at low volume is a common starting point. If you'd like something closer to the in-utero environment, try our Womb Sounds for Newborns mix, which layers a slow rhythmic pulse under continuous noise.

Try Gentle White Noise Now

Free, synthesised, with a built-in sleep timer — no ads, no sign-up.

▶ Play White Noise Womb Sounds for Newborns

🤰 Womb Sounds for Newborns

A heartbeat-layered mix for very young infants

🤍 White Noise

The classic broadband sleep sound

❤️ Heartbeat Sound

60 BPM grounding rhythm

🌙 Sleep Wind-Down Tool

Guided drift-off with a built-in sleep timer

🧒 ASMR for Kids

Age-by-age guidance beyond infancy