What is Pink Noise?

Have you heard of white noise? Similar to white noise, pink noise contains frequencies of sounds humans can hear.

However, with pink noise, the higher frequencies of sound are less intense. This is less overwhelming and more pleasant to the ear.

All the affirmation audios have a layer of pink noise added to them.

THE SCIENCE OF PINK NOISE

A recent study published in 2017 examined pink noise on sleep for a group of 13 adults and found that pink noise helped slow wave activity, associated with deep sleep.

A similar 2016 study found that pink noise also improved sleep and memory for younger adults taking a daytime nap.

Several studies in 2012 and 2013 found that pink noise could result in deeper and longer sleep. It also helped improve memory. This was true for both nighttime sleep and daytime naps.

SOURCES:

1. Papalambros NA, Santostasi G, Malkani RG, Braun R, Weintraub S, Paller KA, Zee PC. Acoustic enhancement of sleep slow oscillations and concomitant memory improvement in older adults. Front Hum Neurosci. 2017 Mar 8;11:109. doi:10.3389/fnhum.2017.00109

2. Ong JL, Lo JC, Chee NI, Santostasi G, Paller KA, Zee PC, Chee MW. Effects of phase-locked acoustic stimulation during a nap on EEG spectra and declarative memory consolidation. Sleep Med. 2016 Apr;20:88-97. doi:10.1016/j.sleep.2015.10.016

3. Barone J. Pink noise for sleep. Berkeley Wellness. March 30, 2017.