Best white noise for newborns
White, pink, or brown noise: which actually works? The 5 sound machines we tested over 30 nights, the volume that's safe, and what matters before you buy.
Gear · Sleep
TL;DR
Brown noise (low, rumbly) works best for newborns. Volume target: 50 to 65 dB at baby's bassinet — about as loud as a normal conversation, not a shower. Distance from baby: at least 6 to 7 feet. The 5 sound machines that pass our test: Hatch Rest Mini, Yogasleep Hushh, Marpac Dohm, LectroFan Micro2, and Snooz. Skip ones with lights and timers — continuous is the goal.
Pair the sound machine with the right wake windows for your baby's age. Try our free wake windows calculator.
The science of why white noise works
The inside of the womb is loud. Around 75 to 90 decibels of constant low-frequency rumble from blood flow, digestive sounds, and the mother's heartbeat. When babies are born, the silence of a quiet room is actually more disruptive than a loud room. They evolved to sleep through noise.
Continuous sound mimics the womb. It also masks startling sudden sounds (the dog barking, the doorbell) that would otherwise jolt baby awake mid-cycle.
Studies on infant sleep and white noise consistently show babies fall asleep faster and stay asleep longer with continuous sound in the room.
White vs pink vs brown noise
White noise: All frequencies at equal energy. Sounds like static or "shhh." Most well-known type. Works for many babies.
Pink noise: Lower frequencies emphasized. Sounds like steady rain or wind. Slightly more soothing for some.
Brown noise: Even lower frequencies. Sounds like a deep waterfall or distant thunder. Most similar to womb sounds. Works best for the highest percentage of newborns.
If your baby doesn't respond to white noise, try brown noise. The difference is significant for some.
Safe volume and distance
An AAP-cited 2014 study tested 14 popular sound machines and found that several exceeded recommended noise levels for infants when placed close to the crib. Excessive volume over long periods can affect hearing development.
The guidance:
- Volume: 50 to 65 dB at baby's head. About a normal-conversation level.
- Distance: at least 6 to 7 feet from baby. Not on the crib, not on the bassinet itself.
- Test with a free dB meter app on your phone. Hold the phone where baby's head will be, set the machine, check the reading.
If you're not sure if it's too loud: it should be quieter than a shower. If you can comfortably talk over it in a normal voice, you're probably fine.
The 5 sound machines worth buying
1. Hatch Rest Mini
The Mini is the basic version of the popular Hatch. No light, no app, no nonsense. Single physical button to turn it on, dial for volume. Comes pre-loaded with brown noise, white noise, ocean, and a few others.
About $30. The best entry point for new parents who just want a continuous sound machine.
2. Yogasleep Hushh
Portable, rechargeable, clip-on. Made specifically for travel. Battery lasts about 10 hours. Three sound options: bright white, deep white (brown noise), gentle surf.
About $35. Great as a second machine for travel or strollers.
3. Marpac Dohm
The "OG" sound machine. Mechanical fan-based sound, not digital. Hum is continuous and analog, which some babies prefer because there's no loop point. No lights, no extras, just sound.
About $50. Lasts decades. Some parents swear by them.
4. LectroFan Micro2
Compact Bluetooth speaker + sound machine. 12 sound options including 4 fan sounds and several "non-looping" white/pink/brown noises. Can also play through Bluetooth if you want to use a phone-app sleep sound.
About $40. Multi-purpose, travel-friendly.
5. Snooz
Higher-end mechanical fan sound machine. Adjustable tone (the fan blades adjust to slightly change the pitch). Companion app for remote control. Bigger and more expensive than the Marpac.
About $100. Worth it for parents who want analog sound and app control.
Wake windows that match your sound machine setup
The right wake windows + the right sound machine = the foundation of a sleep plan. Personalized to your baby's age.
Try the wake windows calculatorWhat to avoid
- Sound machines with built-in nightlights. Light disrupts melatonin and sleep. If you need a nightlight, get a separate red-spectrum one.
- Timer-only models. Babies wake up when the sound stops. Continuous is the goal.
- Heart-shaped, animal-themed bedside ones marketed for babies. Often shorter loop points (looping audio that creates a tiny pause every 30 seconds) — many babies wake during the loop break.
- Phone-app sleep sounds played through phone speakers. Battery drain, looping issues, lock-screen interruptions.
- The "smart" sound machines that adjust to baby's cry. Defeats the masking purpose by changing in response to the baby.
How to introduce the sound machine
- Test placement. Set machine 6 to 7 feet from where baby will sleep. Place a phone at baby-head height, run a free dB meter, aim for 55 to 60 dB.
- Start on day 1. Babies don't need a "transition" — they're used to womb noise. The first night home is the right night to start.
- Use during all sleep. Naps and nights. Consistent association with sleep.
- Continuous, not timer. No automatic shut-off. Most machines have a continuous setting; pick that one.
How long to use it
Sound machines aren't a "fourth trimester" tool. Most parents use them through the first 1 to 2 years. Some use them through age 5+. There's no AAP guideline against ongoing use, as long as volume and distance stay appropriate.
When you're ready to wean (often around age 3 to 4), gradually lower the volume over 2 to 3 weeks until it's not needed.
Travel: what about hotels and grandparents' houses?
This is where a portable sound machine matters. Bring it everywhere baby sleeps. Hotel rooms, grandma's spare bedroom, weekend trips. The consistent sound is one of the most reliable "sleep cues" you can carry.
The Yogasleep Hushh, LectroFan Micro2, and Hatch Rest Mini all travel well. Worst case, a phone with a sound-machine app can be used for one or two nights in a pinch.
Common questions
Will my baby become "dependent" on it?
Mild yes, but in the same way they're "dependent" on a dark room and a sleep sack. Sleep cues are good, not bad. If you ever need to drop it (travel emergency, broken machine), most babies adjust within 1 to 3 nights.
Can I use a fan or air conditioner instead?
Yes, as long as the sound is continuous and at the right volume. A box fan or window AC produces a low-frequency hum that works similarly to brown noise. Just check the volume at baby's head.
What if my partner can't sleep through it?
Place the machine on baby's side of the room and use bedroom-isolating positioning. Or your partner uses earplugs. The baby benefit usually outweighs the parent disruption, especially after the newborn weeks pass.
Does it affect hearing development?
Not at appropriate volumes (50 to 65 dB, 6+ feet away). The concerns are real for sound machines turned to maximum volume right next to baby's head. Keep the volume and distance right and there's no evidence of hearing impact.
The bottom line
A sound machine is one of the cheapest, highest-impact sleep tools for newborns. Pick a continuous-sound model with no timer and no light, place it 6 to 7 feet from baby at 55 to 60 dB, and use it for every sleep.
If you've already tried white noise without success, switch to brown noise. The change is meaningful for many babies.