With the click of a switch, your fan springs to life and you're enveloped in a breeze of soothing white noise to help you sleep, study or relax. Steady, low sounds like the whir of a fan or air conditioner are soothing and can help mute distracting or sudden noises. This explains why some people sleep with a bedside fan running, every night, no matter what the temperature. That's where sleep sounds come in. By filling our bedrooms with a constant sound, we can muffle those outside sounds and c