Pink noise helps geriatrics sleep

“Pink noise has more lower octaves than typical white noise and is hardly soothing. For example, it can be one-second pulses of the sound of a rushing waterfall. The short pieces of quick, quiet sounds would be really annoying if you were trying to fall asleep.

But the pink noise isn’t trying to get you to fall asleep; it’s trying to keep you in a very deep sleep where you have slow brainwaves. This is one of our deepest forms of sleep and, in particular, seems to decline in aging adults.”

http://www.cbc.ca/news/technology/study-pink-noise-improves-sleep-memory-1.4017811

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