White noise allows the brain to block out the disturbing sounds that keep people from sleeping. White noise can help you sleep better as it drowns out noises, so you’re less likely to be disturbed when you hear them. When a noise wakes you up in the night, it’s not the noise itself that wakes you up, but the sudden change or inconsistencies in noise that jar you. White noise creates a masking effect, blocking out those sudden changes that frustrate light sleepers & babies, or people trying to fall asleep.