Does White Noise Actually Help You Sleep?
A lot of us fall asleep to a fan, a hiss or an app. By the end of the drive you'll know what white, pink and brown noise actually are, how a steady sound can make a sudden one less likely to wake you, what the studies really show and how thin some of them are, why one sleep lab now urges caution about leaving it on all night, what it means for a baby's sound machine, and what one small study found when it put that sound up against a pair of foam earplugs.
When a University of Pennsylvania team reviewed 38 research papers in 2021, they rated the quality of the evidence that continuous noise…
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