Think your sound machine is helping you sleep? It might be doing the opposite. A new study from the University of Pennsylvania Perelman School of Medicine found that listening to pink noise at bedtime ...

Pink noise emphasizes lower frequencies — making it sound similar to steady rainfall or ocean waves. It’s often used for sleep.

Sound machines may not be the sleep saviors many believe. Researchers found that pink noise significantly reduced REM sleep, while simple earplugs did a better job protecting deep, restorative sleep ...

Plenty of people use apps and ambient sound machines to reduce clamor and improve their sleep — but not all noise is created equal. In fact, new research suggests that a particular type could ...

“The sound machine can generate any of several types of sound, from nature [or] music,” Dr. Cory Portnuff, an audiologist at the University of Colorado Health’s Hearing and Balance Clinic, says. In ...