A Penn Medicine study challenges sound machine benefits, finding that "pink noise" disrupts deep sleep and REM cycles, while earplugs are proven more effective.

PHILADELPHIA -- Marketed as a ticket to deeper sleep, the soft hum of pink noise has become part of millions’ nightly routines. However, its use may come at the cost of sleep quality, a University of ...

Rather than promoting better quality sleep, pink noise and other ambient noises may harm sleep quality more generally.

For many people struggling to fall or stay asleep, sound machines have become a popular sleep aid. Broadband sounds promise to mask disturbing noises, “soothe” the brain, and help users drift off into ...