Bedroom White Noise Machine. We've read read through this guide and stand by these picks for white noise machines and apps. Fan white noise machines produce pure, natural white noise with no annoying or distracting audio loops.

White noise has both a technical definition and a common use. Most of today's models also include other features, such as headphone jacks and alarm functions. Jenny Lelwica Buttaccio is a writer living in Chicago.

It's whisper quiet on the lowest settings, while at higher settings it produces a pleasant white noise.

Typically, we think of noise as a distraction, but in the case of white noise or other relaxing sounds, it can have the opposite effect: noise can actually help you sleep.

White noise plays all of the frequencies at the volume they come in, which makes it a bit sharper at the high-frequency end of the spectrum. By playing all of these sounds, white noise can cover up. For the entire list of sounds.