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Pink noise
Sep 28, 2017

Pink noise (sometimes called flicker noise) is a signal or process with a spectral density (energy or power per hertz) that is inversely proportional to frequency. In the pink noise, each octave has an equal amount of noise power. The name of the pink noise originates from the visible light in this power spectrum. The visual color is pink.

Pink noise can help people relieve tinnitus, or find white noise listening is not very comfortable crowd. The noise of the genealogy can be more than this point, tone up or down to get brown noise (although Brown, but this noise is named after the name, rather than color), and other types of noise. Different people will prefer different types of noise.

Peking University scholar conducted a new study found that: in a pink noise environment can make people sleep deeper and more stable. Pink noise is a random noise that is the same at all frequencies. When the raindrops fall on the sidewalk and the breech cries are blowing over the foliage of the tree, the sound is pink noise. In order to study the effects of pink noise on sleepers, the research team called 50 volunteers, who were placed in pink or no noise during their nighttime sleep and daytime nap, and carried out their brain activity monitor. The results show that up to 75% of volunteers report that sleep is more stable when they are in a pink and noisy environment; in the brain activity, those who sleep at night are in a pink and noisy environment, (The most sleepy process of sleep) increased by 23%, while the daytime nap people in the pink noise environment will make their stable sleep time increased by 45%.