The background sounds of life happening, like the ice in your freezer randomly reshuffling or your dog vigorously scratching behind its ear, can make falling asleep difficult. Whether you are sharing ...

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Getting a good night’s sleep is hard. A third of all American adults report getting less than the daily recommended amount of sleep nearly every night. Too little noise, and the mind starts to race.

Every night, I—like millions of others—put on a noise machine to help me sleep. Mine offers several types of noise: white, pink, green, and brown. I’ve noticed something strange, though. After about ...