Why fan noise works
A fan is the original white noise machine. Its sound is mostly low and mid frequencies, closer to brown noise than true white noise, with a slow variation from the blades that keeps it from sounding artificial.
Plenty of adults can't sleep without one, and it travels badly. Hotels, guest rooms and winter nights are where a fan sound on your phone earns its keep.
Built like a real fan
This box fan isn't a recording. It's built from three parts that change on their own: airy noise with an irregular wobble, a low rumble and a 59 Hz motor hum. Because it's generated live, the wobble never repeats on a pattern you can learn and start listening for.
Want something louder? The Deeper Nights pack in Sleepy Noise Lifetime adds Metal Fan, a recording of a loud, steady metal-blade fan for heavy sleepers.
Frequently asked questions
Is fan noise the same as white noise?
Not quite. A fan's sound has more low-frequency energy than true white noise and a slight rhythm from the blades. Many people find it warmer and easier to sleep to.
Is there free fan noise for sleeping with no ads?
Yes, this page, and Box Fan is one of the free core sounds in the Sleepy Noise app. Neither has ads.
