Babies don’t need silence to sleep. Many settle more easily to a soft, steady sound that smooths over the clatter of a busy home and, night after night, tells them that it’s time to rest. Below are the 27 sounds in Baby Mantra, grouped by family, with real previews you can play right here. If you only read one thing first, make it how loud white noise should be.
Why steady sounds help babies settle
A steady sound works in two ways. First, it masks sudden noises: a sibling, a car door or a barking dog stands out much less against a soft, constant background. Second, used at the same point in every bedtime routine, it becomes a sleep cue, a familiar signal that the day is winding down.
The research is modest but encouraging. In a small classic study of newborns, Spencer and colleagues (1990) found that more babies fell asleep within five minutes with white noise playing than without it. Sound is not a cure for sleepless nights, but it can be a gentle, low-effort part of a calm routine. We look at the evidence in more depth in does white noise help babies sleep.
Real previews from the app. Play them softly.
The five sound families
| Family | Sounds in Baby Mantra | Often best for |
|---|---|---|
| Noise colors | White noise, pink noise, brown noise | Masking household noise; naps in bright, busy homes |
| Nature | Rain, rain on roof, thunder, ocean waves, waterfall, wind, forest birds, crickets, fireplace | A softer, more natural background; older babies and toddlers |
| Womb & comfort | Womb sounds, heartbeat, shushing, purring cat | Newborns in the first weeks and months |
| Household hums | Hair dryer, vacuum, fan, washing machine, train | Babies who already calm to an appliance |
| Music | Music box, soft piano, harp, acoustic guitar, singing bowl, kalimba | The wind-down before sleep |
Noise colors: white, pink and brown
White noise spreads its energy evenly across all frequencies, which gives it a bright, steady shhh. Pink noise is softer and deeper, a bit like steady rain, and brown noise is a low rumble, like a distant waterfall. White noise has the most research in infants; pink and brown are gentler-sounding options some babies prefer. See white noise for babies, the softer pink noise for babies and the deep brown noise for babies, or compare all three in pink vs white vs brown noise.
Nature sounds: rain, ocean and fire
Rain behaves much like natural pink noise: even, soft and without sharp edges. Ocean waves add a slow, rhythmic swell. Keep thunder very quiet, or leave it out for babies who startle easily. Read more in rain sounds for baby sleep and ocean sounds for sleep.
Real previews from the app. Play them softly.
Womb and comfort sounds for newborns
Before birth, babies hear the constant whoosh of blood flow, a muffled heartbeat and voices. Womb sounds, a slow heartbeat and soft shushing echo that world, which is why they’re a favorite for the first months. Womb sounds and heartbeat are both free in Baby Mantra. Learn more about womb and heartbeat sounds for newborns.
Real previews from the app. Play them softly.
Household hums
If your baby calms to the hair dryer or the vacuum, you’re not alone. These hums are natural white and brown noise. A recording is safer than running the real appliance near your baby, with no heat, no cords in reach and a volume you control. See hair dryer and vacuum sounds.
Gentle music for winding down
Slow, quiet music suits the last minutes before sleep: a music box, soft piano or harp. Many parents play music during the routine, then let a steady sound carry the night. Explore our lullabies for babies.
Real previews from the app. Play them softly.
How to use sleep sounds safely
For the full picture, read is white noise safe for babies.
Mixing sounds: three ideas to try
Baby Mantra lets you blend up to three sounds and set each volume separately. A few gentle starting points:
- White noise + gentle rain: steady masking with a softer, natural texture.
- Womb sounds + heartbeat: a familiar mix for the newborn weeks.
- Brown noise + ocean waves: a deep, slow background for toddlers and noisy streets.
Five sounds are free with no account: white noise, gentle rain, ocean waves, womb sounds and heartbeat. Save a mix you love and start it with one tap tomorrow night. Set a timer from 15 minutes to 2 hours with a gentle fade-out, or play all night with the screen dimmed. Everything works offline, so nothing buffers at 3 a.m. See everything the Baby Mantra app can do.
Sources
- American Academy of Pediatrics. Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment. Pediatrics, 2022.
- Hugh SC, Wolter NE, Propst EJ, et al. Infant sleep machines and hazardous sound pressure levels. Pediatrics, 2014.
- Spencer JA, Moran DJ, Lee A, Talbert D. White noise and sleep induction. Archives of Disease in Childhood, 1990.
- HealthyChildren.org (AAP). How to Keep Your Sleeping Baby Safe: AAP Policy Explained.
In this section
White Noise for Babies
White noise for babies, explained: what it is, why it helps many babies settle, how loud and how far away to play it, and when to stop. Includes a real preview.
Pink Noise for Babies
Pink noise for babies: what it sounds like, how it differs from white noise, what the research really says, and how to play it softly and safely at bedtime.
Brown Noise for Babies
Brown noise for babies: what the deep, rumbly sound is, why it’s trending, what the evidence says, who it may suit, and how to play it at a safe volume.Rain Sounds for Baby Sleep
Rain sounds for baby sleep: why gentle rain works like natural pink noise, when to skip thunder, three calming rain mixes, and how to keep the volume safe.
Ocean Sounds for Baby Sleep
Ocean sounds for baby sleep: how slow waves and waterfalls fit a calm wind-down, waves vs white noise, mix ideas, more nature sounds, and safe volume tips.
Womb & Heartbeat Sounds
Womb sounds for newborns: what babies hear before birth, why womb, heartbeat and shushing sounds can soothe, how long to use them, and how to play them safely.