The legacy of sleep sounds, white noise has lulled people to sleep for ages. Because white noise encompasses all of the ...

While green noise has long been my favorite, I may have discovered a new contender while writing this article: blue noise. "Blue noise is the highest frequency of these sound profiles," explains Shah.

If you need the whirl of a fan to fall asleep, you're not alone. Many people use white noise-like sounds to drown out unwanted noise. Many people have a love-hate relationship with noises at night ...