On its face, flipping on white noise before hitting the sack must be the most counterintuitive idea out there. Want to sleep better? Simple solution: make a bunch of noise.
And yet, not only do some people swear they can't get to sleep without a fan running, there are companies that will sell you noise-makers for helping you get the best of your bed rest. What is up with our brains and our ears? The short answer: white noise is better noise. At least for some sleepers.