White Noise for Babies: Safe Volumes and Placement (AAP Guidance)
Updated April 2026 · 9 min read
Not medical advice. This page summarises published guidance from the American Academy of Pediatrics and other professional bodies. Consult your pediatrician or a paediatric sleep specialist for advice specific to your infant.
Key guidelines at a glance
- Volume: At or below 50 dB, measured at the baby’s head position (AAP 2023 policy statement).
- Distance: At least 7 feet (approximately 2 metres) from the crib.
- Placement: Never inside or directly beside the crib; on a shelf or dresser at the 7-foot minimum distance.
- Duration: Sleep timer with 60-minute fade-out is recommended over running all night.
- Colour: Pink or white noise preferred; violet not recommended for infants.
What the AAP actually says
The American Academy of Pediatrics published a policy statement on noise as a health hazard for foetuses, infants, and children (Pediatrics, 2023). The relevant recommendation for infant sleep-noise devices is:
“Infant sound machines should not be placed inside, or directly beside, a child’s crib or at full volume. Sound machines should be placed as far away from the infant as possible, at a low-to-moderate volume (50 dB or below).”
American Academy of Pediatrics, Pediatrics 2023; Harrison, HS et al.
The 50 dB ceiling is a meaningful threshold. The CDC defines 60 dB as the level at which noise exposure begins to carry long-term risk for children with frequent exposure. The AAP sets the infant benchmark lower at 50 dB to create a safety margin, recognising that infants are exposed to these sounds during a period of active auditory development.
A 2014 study in Pediatrics (Hugh et al.) tested 14 infant white-noise machines and found that all 14 produced more than 50 dB at 30 cm (the typical beside-crib position), and 85% produced more than 85 dB at maximum volume. This motivated the AAP guidance on placement and volume caps. The study’s finding that machines easily exceed safe levels at close range is why the 7-foot rule matters.
Why infant hearing is especially vulnerable
Infant hearing development is not complete at birth. The auditory cortex continues to develop and refine its structure in response to sound input from birth through the early years. Noise-induced hearing loss in early childhood, even at moderate levels sustained over time, can affect this developmental trajectory in ways that differ from adult exposure patterns.
The cochlea (inner ear) of newborns is physically mature, but the neural pathways connecting it to the auditory cortex are still myelinating and organising. High-volume continuous noise during this period is a different biological situation than the same exposure in an adult with fully developed auditory architecture.
The risk from properly-used white noise (50 dB or below, at distance) is considered negligible by the AAP. The risk from improper use (machine at volume, placed close to the infant’s head) is real. The safety guidance exists because the difference between safe and unsafe use is primarily about placement and volume, not about the existence of white noise itself.
How to measure dB on a smartphone
You do not need specialist equipment to check your white-noise volume. A free dB meter app on your smartphone gives a good enough measurement for this purpose. Popular options include:
- NIOSH SLM (iOS): The National Institute for Occupational Safety and Health’s sound-level-meter app, free, calibrated, and highly recommended.
- Decibel X (iOS/Android): Popular, reasonably accurate, free tier sufficient for this use.
- Sound Meter (Android): Basic but effective for a relative reading.
Measurement procedure: With white noise running at your intended volume, hold your phone at the position where your baby’s ears would typically be (at mattress level, near the head end of the crib). Take a 10-second reading and note the average dB level. This should read 50 dB or below. If it reads above 50, reduce the volume on your sound machine or increase its distance from the crib.
Reference dB levels
- Quiet library: approximately 40 dB
- Normal conversation at 1 metre: approximately 60 dB
- AAP safe ceiling for infant sound machines: 50 dB
- Our “Baby” preset targets approximately 45 dB (conservative margin)
Which noise colour is best for babies?
Pink noise is the most commonly recommended colour for infants. The reasoning is that the intrauterine environment, where the baby develops its initial sound experience, has a spectrum that resembles pink noise. Blood flow through maternal vasculature and muffled external sounds create a low-frequency-dominant ambient environment. Pink noise’s warmer, bass-weighted spectrum may be more familiar and therefore more soothing than the harsher high-frequency content of pure white noise.
White noise is widely used and is safe at the correct volume. Many parents find it equally effective. The spectrum difference between pink and white noise at normal listening levels is unlikely to have a measurable safety difference; the volume and distance rules apply equally to both.
Brown noise is appropriate for older infants (4 months and above) at safe volumes. Violet noise is not recommended for infants due to its high-frequency emphasis, which is further from the intrauterine sound profile and potentially more stimulating to developing auditory pathways.
Placement rules
Never
- Inside the crib
- On the crib rail
- On a shelf directly beside the head end at short distance
- At maximum volume
Always
- At least 7 feet (2 metres) from the crib
- On a dresser or shelf across the room
- At or below 50 dB measured at baby's head
- With a sleep timer set (60 minutes recommended)
Does white noise cause dependence in babies?
The AAP does not classify white-noise dependence as a clinical concern. Infants can develop a sleep association with white noise in the same way they may associate sleep with a particular routine, temperature, or being rocked. This is normal behavioural conditioning. It is not physiological addiction.
If you decide you want your child to sleep without white noise in future, a gradual transition (progressively reducing volume over two to four weeks) is effective for most infants. There is no clinical evidence of withdrawal effects or adverse outcomes from discontinuing use.
Frequently asked questions
How loud should white noise be for a baby?+
At or below 50 dB, measured at the baby's head position. This is roughly the level of a quiet conversation. The NIOSH SLM app (free, iOS) or Decibel X can give you a quick reading.
Can babies become dependent on white noise?+
Habituation is possible (they may prefer it) but physiological dependence is not. The AAP does not flag dependence as a clinical concern. Gradual volume reduction works if you want to transition away from it.
Which noise colour is best for babies?+
Pink noise is most commonly recommended because its spectrum resembles the intrauterine environment. White noise is widely used and safe at correct volumes. Violet noise is not recommended for infants.
Looking for a dedicated baby sound machine?
Our free generator is a good starting point. A dedicated device adds always-on convenience and often includes volume caps. See our buyers guide for the top-rated options including the Hatch Rest, Yogasleep Hushh, and Dreamegg D11.
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