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 ...

A study found that certain types of background noise used by millions to help them sleep actually interferes with their sleep ...

Color us surprised. 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 ...

“White noise encompasses sound from the complete spectrum,” she said. “Brown noise, also known as red noise, or ‘brownian noise,’ consists of only low frequency sound, giving it more bass-heavy notes.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." You probably know about white noise, or have seen one of those humming machines outside a therapist's ...

Ambient sounds or pink noise - often used to promote better patterns of sleeping - may in fact reduce restorative REM sleep.