Safety
White noise safety for babies: the complete checklist
White noise is safe for most families when three things are right: how loud it is, how far away it is and how it is placed. This is the checklist.
To use white noise safely with a baby: keep it at about 50 decibels or lower at the crib, put the source as far away as the room allows (never in the crib), keep cords out of reach, and follow safe sleep guidance. Volume is the most important rule.
The three rules
- Volume. About 50 decibels or lower at the baby's head, roughly a quiet conversation.
- Distance. Across the room, ideally about two meters (6 to 7 feet) or more from the crib.
- Duration. Consider a timer, especially if you cannot keep the volume low.
Why these rules exist
In 2014, researchers published a study in Pediatrics that tested 14 infant sleep machines. At maximum volume, every machine could produce sound above 50 decibels, which is the limit recommended for hospital nurseries, and some were loud enough at close range to be a concern for hearing if used for long periods. The researchers suggested that machines should be placed far from the crib, at low volume and not run all night. That is the basis for the checklist below.
There are no official exposure limits for babies. Adult workplace guidance (for example, 85 decibels over eight hours) is a ceiling, and babies are not small adults, so most advice stays well below it.
Safety checklist
- Test the volume at the crib with a decibel meter app. Phone meters are approximate, so leave margin.
- Put the device on a stable, flat surface across the room.
- Never place sound machines or phones in the crib, on the rail or on the mattress.
- Keep cords and chargers out of reach.
- Avoid sound toys attached to the crib or cuddly toys with speakers.
- Do not hold a speaker against your baby's ear.
- Check the volume again after a firmware or app update, a device change or a different room.
- Use Do Not Disturb so a call or alert does not play at full volume.
Safe sleep still applies
Sound does not change the basics: baby on their back, on a firm, flat sleep surface, with no pillows, blankets, bumpers or toys, and a comfortable room temperature. Follow your pediatrician's or the American Academy of Pediatrics' current guidance.
Is a phone speaker safe?
A phone speaker is small and usually cannot play very loud, which can be a benefit. Play it at a low volume across the room, not near the crib. Do not use headphones on a baby.
Concerns about hearing and development
High-volume sound for long periods can harm hearing at any age. Studies in young animals exposed to continuous loud noise have shown changes in auditory development, though this has not been shown in babies at safe volumes. The practical answer is the same: keep it quiet.
If you are worried
If you think your baby has trouble hearing, does not react to sounds or seems distressed by sound, speak to your pediatrician.
Frequently asked questions
What decibel level is safe for a baby's white noise?
A common target is 50 decibels or lower at the crib, roughly a quiet conversation. See how loud should baby white noise be.
How far should a white noise machine be from the crib?
As far as the room allows, ideally across the room, about two meters or more.
Is white noise harmful to babies?
Not when played quietly and from a distance. The risk comes from high volume and close, long exposure.
This page is general information, not medical advice. Talk to your pediatrician about your baby's sleep and hearing, and follow current safe sleep guidance.