How to use the nap sound mixer
There's no single sound that works for every baby. The mixer lets you blend several soothing sources, each with its own level, so you can find the combination that settles your child — then save it and tap play next time.
The sounds you can blend
White, pink & brown noise
Steady broadband sound that softens sudden noises — a door, a sibling, traffic. White is brightest and masks the most; pink is balanced and natural like soft rain; brown is deep and rumbly. Many parents find pink or brown gentler for sleep.
Heartbeat
A gentle lub-dub at about 60 beats per minute. A steady heartbeat is one of the most familiar sounds from before birth, and many newborns settle to its rhythm.
Shush
A rhythmic "shhh", echoing the sound a parent makes instinctively while rocking a baby. It pulses on a slow cycle rather than running flat.
Fan
The soft, moving whir of a bedroom fan — a long-time favorite for nurseries because it's steady but never harsh.
Womb
A low, whooshing rumble that resembles the muffled blood-flow sounds a baby hears before birth. Often paired with heartbeat for very young infants.
Try a preset, then make it yours
Tap a one-touch preset to start, then nudge the sliders to taste:
- Newborn — womb, heartbeat, and a little shush, echoing the sounds of before birth.
- Nap time — pink noise with a gentle fan for daytime sleep.
- Deep sleep — deep brown noise warmed with a touch of womb whoosh.
- Car ride — fan and pink noise, similar to the hum many babies sleep through in the car.
Set the master volume, pick a sleep timer, and press Play (or tap the spacebar). Save a blend that works and it'll be one tap away next time.
Why familiar sound helps babies settle
The womb is not a quiet place — estimates put it around 70 to 90 decibels of constant whooshing from blood flow and muffled outside sound. Steady, predictable sound can recreate something of that familiar environment and soften the sudden noises that might otherwise startle a sleeping baby. It isn't a guarantee, and every child is different, but many families find a consistent sound becomes a helpful part of the bedtime and nap routine.
A note on safe volume
Sound machines are a comfort tool, not a medical device. Pediatric guidance generally suggests keeping infant sleep sound below about 50 decibels and placing the source several feet from the crib rather than right beside it. Use the lowest level that helps, and check in with your pediatrician if you have any concerns. For a deeper look, see our guides for newborns and babies.