An act of resetting your mind to its waking up state on the previous morning. It is advisable to scan your mind and run clean up programme before you retire to sleep.
Research
This “white noise” might be used to cancel out background noise while working, or to help you get to sleep. However, recently, people started talking about a different kind of noise called “pink noise”.
Deep sleep is critical to maintaining a robust memory, but both decline with age. In March 2017, a small study published in Frontiers in Human Sciences by Zee et.al, suggested that one easy way for older adults to get deeper sleep and stronger memories is to listen to a certain soothing sound called “pink noise”—a mix of high and low frequencies that sounds more balanced and natural than its better-known cousin, “white noise.”
In this study, a total of 13 adults ages 60 and older spend two nights in a sleep lab. Each night, they took a memory test, went to sleep wearing headphones, and repeated the same memory test in the morning.
On one night, those adults were played short bursts of pink noise during deep sleep – what Dr. Phyllis Zee, professor of neurology at Northwestern University Feinberg School of Medicine, described to The Time as a “fairly pleasant” noise that “kind of resembles a rush of water” – and on the other night, no noise was played.
It may sound strange, but previous study (J Theor. Biol, 2012 Aug 7) titled: Pink noise: effect on complexity synchronization of brain activity and sleep consolidation, by Zhou J, et al, has found that playing so-called pink noise during sleep improves the memory of younger adults. “We wanted to see if it would work in older people, too,” says senior author prof. Zee. Older people tend to get less slow-wave sleep and are at greater risk for memory impairment.
Older studies have also shown that young people’s memories could be boosted by the noise too.