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2. Colors of noise - Wikipedia

   en.wikipedia.org/wiki/Colors_of_noise

   Grey spectrum. Grey noise is random white noise subjected to a psychoacoustic equal loudness curve (such as an inverted A-weighting curve) over a given range of frequencies, giving the listener the perception that it is equally loud at all frequencies.

3. Grey noise - Wikipedia

   en.wikipedia.org/wiki/Grey_noise

   Grey noise spectrum The result is that grey noise contains all frequencies with equal loudness , as opposed to white noise , which contains all frequencies with equal energy . The difference between the two is the result of psychoacoustics , more specifically the fact that the human hearing is more sensitive to some frequencies than others.

4. White noise - Wikipedia

   en.wikipedia.org/wiki/White_noise

   White noise draws its name from white light, [2] although light that appears white generally does not have a flat power spectral density over the visible band. An image of salt-and-pepper noise In discrete time , white noise is a discrete signal whose samples are regarded as a sequence of serially uncorrelated random variables with zero mean ...

5. Doctors Say This Type Of Noise Is Best For Deep Sleep - AOL

   www.aol.com/doctors-type-noise-best-deep...

   The big three in sleep sounds are white noise, brown noise, and pink noise, but there are many other noise types, including purple noise, gray noise, and even black noise (a.k.a. good ol ...

6. How to Find Your Right Noise for the Best Sleep Ever - AOL

   www.aol.com/noise-best-sleep-ever-130000266.html

   Find out which noise is best for sleep: white vs. brown vs. pink. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail. 24/ ...

7. How to fight noise with white noise for a better night's ...

   www.aol.com/fight-noise-white-noise-better...

   Sometimes the only way to combat noise is with more noise. "White noise," "brown noise" and "pink noise" can help you mask unwelcome sounds