Fan white noise for sleep, 8 hours of that steady, soothing hum of a fan running in the room. The smooth, even sound blocks out traffic, voices, creaks and sudden noises so babies and adults fall asleep faster and stay asleep. A fan sound is one of the most popular sleep sounds in the world, warm and familiar without being harsh. Press play, keep the volume gentle, and let it run all night. Great for nurseries, naps and blocking noisy neighbours.