Sound Machines for Baby Sleep: Do They Work?
Yes. The short answer is yes. White noise helps babies sleep because it mimics the constant whooshing sounds they heard in the womb for 9 months. The outside world is way too quiet and unpredictable for them. A sound machine makes sleep happen faster and last longer. It's one of the few baby products that genuinely does what it claims.
How Loud Should It Be?
The AAP recommends keeping sound machines below 50 decibels at the baby's ear level. That's about the volume of a quiet conversation. Place the machine across the room from the crib, not right next to baby's head. Some sound machines can reach 85+ decibels at max volume, which is way too loud for prolonged exposure. Use it on a moderate setting, not cranked to full blast.
What Sound Is Best?
Continuous white noise or pink noise. Not ocean waves that crash and fade, not rainforest sounds with random bird calls, not lullabies that end after 30 minutes. You want a constant, uninterrupted sound that runs all night. The on-off patterns of waves or music can actually wake baby up when the sound changes.
Our Picks
**Hatch Rest** ($70) is the most popular and for good reason. It's a sound machine, nightlight, and okay-to-wake clock in one. You control it from your phone, which means you can adjust the volume without walking into the nursery and risking waking the baby. The sound quality is good and it has a ton of sound options.
**Yogasleep Dohm** ($45) is the OG. It's a mechanical fan inside a housing that creates actual air-based white noise, not a recording. Some parents swear it sounds more natural than digital options. It's simple: one switch, two speed settings, no app required. It'll last forever.
**Yogasleep Rohm** ($30) is the travel version. It's portable, runs on a rechargeable battery, and clips to the stroller or car seat. If you travel at all, you need a portable sound machine. Babies who sleep with white noise at home will not sleep well without it in a hotel room.
Common Mistakes
**Turning it off after baby falls asleep.** Leave it on all night. The consistency is the point. If the sound stops at midnight, baby might wake up because the environment changed.
**Using a phone app as a permanent solution.** Phone apps work in a pinch, but your phone will get notifications, run out of battery, or disconnect from Bluetooth at 3am. A dedicated machine is more reliable for nightly use.
**Putting it in the crib.** The sound machine goes on a dresser or shelf across the room. Not in or on the crib. Nothing extra goes in the crib.
When to Stop
You don't have to stop. Many kids use white noise through preschool and beyond. Adults use it too. There's no developmental reason to wean off white noise. If it helps everyone sleep, keep using it.