Sound Machines Put to the Test for Better Sleep

Reviewers have tested a range of sound machines to help kids and adults fall asleep, comparing options from simple white noise devices to models that double as sunrise clocks.

Device Options

The Snooz white noise machine uses a real internal fan to generate sound rather than digital speaker playback, and its mesh sleeve can be twisted to adjust the volume. The Hatch 3 functions as a sunrise alarm clock, a dimmable bedside light, and a sleep tracker that monitors sleep stages using motion-tracking without cameras or microphones. Another model, the Hatch Rest, replaces an older version with an updated app interface, a nightlight button, and glowing colors for kids. For travel, a compact portable sound machine includes a night light and Bluetooth connectivity, while the tiny Restnature machine packs 16 sound options into a pocket-sized device. Meanwhile, a basic machine offers a decade-long track record, running on either a DC power jack or four AA batteries with options for thunder, ocean waves, brook, summer night, rain, and white noise.

Noise Types

Sound machines offer different frequencies known as colors of noise, which are measured similarly to light waves. Pure white noise mixes all human-hearable frequencies, while pink and brown noise sit at the lower end of the spectrum to help people sleep more deeply.

Context

Sound machines are widely used to block out disruptive background noises and calm the mind before sleep. Choosing the right device often depends on whether you need a portable option for travel or a feature-packed bedside clock for daily home use.