Pink noise has emerged as a “natural-sounding” alternative to white noise, with plenty of people claiming it’s a better way ...

Pink noise—often used to promote sleep—may reduce restorative REM sleep and interfere with sleep recovery. In contrast, earplugs were found to be significantly more effective in protecting sleep ...

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