The ambient and steady, static-like tone from pink noise is similar to tapes of heavy rainfall or ocean waves, and aims to soothe the brain into a deep slumber. Pink noise contains lower frequencies ...

Pink noise — low-frequency broadband noise often used in sound machines and sleep apps — is associated with a decrease in REM ...

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

In A Nutshell Pink noise at 50 decibels reduced REM sleep by 19 minutes per night in healthy adults, potentially affecting ...

The soothing sounds of pink noise, designed to obscure outside clamor and lull listeners into sleep, may not be so innocuous, ...

Scientists studying our planet have a pretty good idea of what goes on up here at the surface. Understanding what's going on deep underground or in the depths of the Earth's oceans is another matter ...

Sound machines promise better sleep, but new research suggests they may quietly steal your REM and deep sleep.