You’d think that the less noise is always better. Nope. Did you know that many people fall asleep faster and sleep better when there is a constant white noise rather than silence or random noises here and there? Your brain gets used to repeating noise so it filters it out while if you have some noise every few seconds or minutes your brain processes it (for example train or airplane, dog barking etc). This machine WILL help you sleep better and longer by drowning out typical city background noises. .