pink noise

American  

[pingk noiz] / ˈpɪŋk ˈnɔɪz /

noun

Physics.

1. a noise signal related to white noise but lacking uniformity, having less power at higher frequencies and more power at lower frequencies; a gentle, steady background sound, like lapping waves or windblown leaves, that filters out distracting or sleep-disturbing noises: higher in pitch than brown noise.

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pink noise British  

noun

1. noise containing a mixture of frequencies, but excluding higher frequencies

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Etymology

Origin of pink noise

First recorded in 1960–65

Example Sentences

Pink noise is commonly used to help people fall asleep, but new research suggests it may interfere with the most restorative stages of sleep.

From Science Daily

A study from the University of Pennsylvania Perelman School of Medicine, published in the journal Sleep, found that pink noise reduced REM sleep and disrupted overall sleep recovery.

From Science Daily

"REM sleep is important for memory consolidation, emotional regulation and brain development, so our findings suggest that playing pink noise and other types of broadband noise during sleep could be harmful -- especially for children whose brains are still developing and who spend much more time in REM sleep than adults," said study lead author Mathias Basner, MD, PhD, professor of Sleep and Chronobiology in Psychiatry.

From Science Daily

These included exposure to aircraft noise, pink noise alone, a combination of aircraft noise and pink noise, and aircraft noise while wearing earplugs.

From Science Daily

Pink noise belongs to a category known as broadband noise.

From Science Daily