White Noise, Pink Noise, and Brown Noise: What’s the Difference and How Do They Support Infant Sleep?

Those early weeks with a newborn can feel like a blur of feedings, diaper changes, and precious, though often elusive, moments of sleep. Amid the swirl of new routines and tiny baby sounds, many families turn to sound machines to help settle their little ones. But did you know not all “white noise” is actually white? There’s also pink and brown noise, and each one has its own unique qualities that can influence how well your baby (and you!) sleep.

Understanding the differences can help you choose the right sound to support more restful nights, and a well-supported family.

What Is White Noise?

White noise is probably what most people imagine when they think of a sound machine: a steady, static-like hum similar to a fan or the fuzzy in-between of a radio station. It includes all audible frequencies at the same intensity, which makes it really effective at drowning out sudden background sounds like doors closing or dogs barking.

It can be especially helpful for calming a fussy baby because it triggers what’s known as the calming reflex, a built-in soothing response. That said, some caregivers find white noise to be a bit too sharp or intense, particularly at higher volumes or for more sensitive little ears.

What Is Pink Noise?

Pink noise is like white noise’s gentler cousin. It still includes all the same frequencies, but it softens the higher ones, creating a sound that feels more balanced and easy on the ears. Think of soft rainfall, rustling leaves, or waves lapping the shore.

Because it’s less jarring, pink noise is often more relaxing for both babies and adults. Some early research even suggests it may help with deeper sleep and memory consolidation during rest. For tired parents trying to catch a few quality hours of sleep themselves, that’s an added bonus.

What Is Brown Noise?

If white noise is sharp and pink noise is soft, brown noise is deep. Also called red noise, it leans heavily into low frequencies and quiets the higher ones. Imagine the soothing sound of distant thunder or the rumble of ocean waves. 

Many parents say brown noise feels the most comforting, almost like being wrapped in a cozy sound blanket. For babies, this deep, rhythmic noise may echo the sounds they heard in the womb, which can make it especially comforting in the early days.

Using Sound Machines Safely: AAP Recommendations

As helpful as these soundscapes can be, it’s important to use them safely. The American Academy of Pediatrics (AAP) recommends placing sound machines at least 7 feet (200 centimeters) away from your baby’s crib and keeping the volume below 50 decibels, about the volume of a soft shower. Sticking to a moderate volume will go a long way in protecting your baby’s developing hearing while still creating a soothing sleep environment.

So, Which Type of Noise Should You Choose?

Like everything in parenthood, the answer is: it depends. Some babies respond best to white noise, while others settle more easily to pink or brown. Don’t be afraid to experiment and see what your little one seems to prefer.

At the end of the day, your goal isn’t just better sleep, it’s a calmer, more confident start to life as a growing family. At Well Supported Family, we believe in nurturing a well-supported family from day one, and that means guiding you toward tools and routines that truly work for you.

If you’re looking for gentle, experienced support through the newborn stage, our Newborn Care Specialists and Postpartum Doulas are here to help every step of the way.