The Best White Noise Machines and Sound Machines

A handful of machines, including the Yogasleep Dohm and SNOOZ Pro, use an actual small fan to generate sound mechanically, the same way the original 1962 Dohm did. Most others, including LectroFan and Magicteam, generate the sound digitally from a recording or algorithm. Neither is more effective at masking noise, but they sound different, and people tend to have a strong preference once they have tried both; if you already know you dislike the sound of digital white noise apps on a phone, a real-fan machine is the safer choice.

The complaint that comes up most often about cheap sound machines is a short audio loop, often just a few seconds long, that repeats audibly and becomes distracting rather than soothing, especially for light sleepers. LectroFan is built specifically to avoid this with longer, non-looping digital tracks, and a real mechanical fan has no loop at all by definition. If you have tried a sound machine before and found it more annoying than helpful, a short loop is the most likely reason, not the general idea of white noise.

A wider volume range matters more than a high maximum. SNOOZ Pro's 10 levels span roughly 46 to 87 dBA measured at the device, which covers both a quiet office and a loud apartment with street noise; a two-speed machine like the Dohm, tuned by twisting its cap and collar, offers less precision but is simpler to operate in the dark. For masking a specific problem, like a partner's snoring or a shared wall, more volume steps make it easier to find the point where the machine covers the noise without itself becoming the loudest thing in the room.

For infants, the American Academy of Pediatrics advises pediatricians to counsel parents on safe use of sleep machines, and a 2014 study in Pediatrics found that all 14 machines tested exceeded 50 dBA, the recommended limit for hospital nurseries, at 30 cm. The concern is that some machines, when placed close to a crib and run at full volume, can exceed 85dB, the level the CDC's NIOSH treats as the daily limit for adult workplace exposure over 8 hours; a baby's ear does not have the option of walking away from that. Running any machine at a lower volume setting from across the room, rather than at max right next to the crib, addresses this directly.

Most sound machines in this guide are meant to live in one spot on a nightstand and plug into the wall. The Yogasleep Hushh 2 is the exception, built around a rechargeable battery and a clip for a stroller or car seat, trading some volume and sound variety for the ability to travel. If you want one machine for a fixed bedroom and a separate one for trips, pairing a full-size pick with the Hushh 2 covers both cases without asking one device to do everything.

• Want the classic real-fan sound with nothing to configure: Dohm.
• Want a real fan plus app scheduling and finer volume control: SNOOZ Pro.
• Want precise digital volume control and a long sound list: LectroFan EVO.
• Want a sunrise alarm and reading light built in: Hatch Restore 3.
• Want the lowest price and the most sound options: Magicteam.
• Need it to travel: Yogasleep Hushh 2.