How does white noise affect sleep

White noise creates a masking effect, blocking out those unexpected noises and sounds that irritate light sleepers such as cars driving past, a wall clock that chimes every hour etc and makes attempting to fall asleep a more natural drifting off into a deeper sleep.
"The simple variation is that hearing still works while you're asleep," states Seth S. Horowitz, a neuroscientist and author of The Universal Sense: How Hearing Shapes the Mind.<br>
White sound machines can reduce the time it takes for for a person to fall asleep, or the time it takes to drop off to sleep, by almost 40% compared to those who do not use these gadgets.

A completely quiet room might cause the possible listener to remain alert, listening for any trace of sound. The noise of white sound offers the mind something to concentrate on without the diversion of music or words. It likewise assists avoiding unexpected sounds throughout the night therefore minimising the occurance of surprising and waking the sleeper.

White noise can also help the brain to relax by giving it a sound to focus on instead of the cacophony of stressful thoughts inside our heads. The faster we're able to fall asleep, the less chance our brain has to keep us up until three in the morning stressing about the day ahead.

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