How Does White Noise Work for Newborns?

Why newborns love white noise

Inside the womb, your baby heard constant sound: a steady mix of blood flow, heartbeat, and gentle movement. It was never truly quiet. White noise mimics that safe, consistent background. Instead of silence—which can feel strange and unsettling—your baby hears a calming hum that reminds them of home.

How white noise helps sleep

White noise works by masking sudden sounds, like a door closing or a dog barking. These noises can jolt a light sleeper awake. With white noise, the environment feels steady and predictable, so your baby can stay asleep longer. The rhythmic sound also creates a sense of comfort, helping them drift off faster when they’re unsettled.

Is it safe for newborns?

Yes—when used wisely. Keep the volume at a safe level, around the sound of a soft shower. Place the machine a few feet away from your baby’s crib. White noise should be a background companion, not a loud distraction.

Growing with your baby

Many parents find that white noise remains helpful beyond the newborn stage. It can smooth bedtime transitions and support naps during toddler years, too. Over time, you may not need it every night, but it’s always there when extra comfort is needed.