Is White Noise Safe for Babies? Volume, Distance and Timing

By the Napling team · · 4 min read

In this guide
  1. Why white noise helps babies sleep
  2. What the research says about volume
  3. How to use white noise safely
  4. Which sound is best?
  5. Will my baby become dependent on white noise?
  6. Quick answers

For many parents, white noise feels like magic: switch it on and a fussing baby softens, a light sleeper stays asleep, the barking dog next door fades away. It’s no surprise so many nurseries have a sound machine humming in the corner.

But is it safe? Used thoughtfully, yes. The key is volume, distance and timing.

The short answer: white noise is generally considered safe for babies when it’s kept quiet (around the level of a soft shower or quiet conversation), placed well away from the crib, and never right next to your baby’s head. A 2014 study found many sound machines can get loud enough to be a concern at full volume, so keep yours low.

Why white noise helps babies sleep

The womb is a surprisingly noisy place, full of whooshing blood flow and muffled sounds. Steady, rumbling sound can feel familiar and calming to a newborn.

White noise also helps in two practical ways:

  • It masks sudden sounds. Doors, dogs, siblings and traffic are less jarring against a steady background.
  • It becomes a sleep cue. Played consistently at naps and bedtime, it tells your baby that sleep is coming.

It’s especially useful for short nappers who wake at the slightest noise, and for early wakers disturbed by morning birds and traffic.

What the research says about volume

In 2014, researchers published a study in Pediatrics called “Infant Sleep Machines and Hazardous Sound Pressure Levels”. They tested 14 infant sleep machines at maximum volume. As the Children’s Hospital of Philadelphia summarizes:

  • Every machine exceeded 50 decibels, the recommended noise limit for hospital nurseries, when measured close to where a baby would lie.
  • Several machines went above 85 decibels, a level linked to hearing damage in adults with long exposure.
  • Even at 200 cm (about 6½ feet) away, all but one machine still exceeded 50 decibels at full volume.

The study measured maximum output, not how parents actually use the machines, and it didn’t show that any baby’s hearing was harmed. But it’s a clear reason to keep the volume low.

How to use white noise safely

Keep the volume low. Aim for a gentle background hum, about as loud as a quiet conversation or a soft shower in the next room. If you have to raise your voice to talk over it, it’s too loud.

Keep it away from the crib. Never put a sound machine or phone in the crib or on the crib rail. Place it across the room. Experts quoted by CHOP suggest more than 200 cm (about 6½ feet) from the crib.

Use the lowest level that works. Start low and only go up if it truly helps.

Consider a timer. Some parents play sound only while their baby falls asleep and for the first sleep cycle, then let it fade. Others play it all night at a very low level. Either way, keep the volume gentle.

Check the actual level. Free sound level meter apps on your phone can give you a rough reading from where your baby’s head will be.

Which sound is best?

There’s no single best sound. Many parents find:

  • White noise (a bright “shhh”) works well for masking household sounds.
  • Pink and brown noise are deeper and softer, and many adults find them more pleasant.
  • Rain, waves and wind are natural and steady.
  • Heartbeat and shushing sounds echo the womb, and often suit newborns.
  • Lullabies can work as a bedtime cue, though melodies are less steady than noise.

Steady, non-changing sound tends to work best for sleep. Avoid sounds with sudden changes or loud peaks.

Napling includes nine sleep sounds: white, pink and brown noise, rain, waves, wind, shushing, heartbeat and a lullaby. It has a timer (or “until awake”) and a gentle fade at the end, so the sound never stops abruptly. Keep your phone across the room, with the volume low.

Will my baby become dependent on white noise?

Some babies do get used to it as a sleep cue, which is part of why it works. That’s usually harmless. If you’d like to stop later, lower the volume gradually over a week or two.

Quick answers

Can white noise cause hearing loss in babies? At very high volumes over long periods, loud sound could be a risk. At a low volume, placed away from the crib, it’s generally considered safe.

Should white noise play all night? Some families keep it on low all night; others use a timer. Either is fine if the volume is gentle.

What decibel level is safe for a baby? Hospital nurseries aim for under 50 decibels on average. Keeping your machine at or below that level at the crib is a sensible target.