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2. 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 ...

3. Colors of noise - Wikipedia

   en.wikipedia.org/wiki/Colors_of_noise

   White noise has a flat power spectrum. White noise is a signal (or process), named by analogy to white light, with a flat frequency spectrum when plotted as a linear function of frequency (e.g., in Hz).

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

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

   White noise can also mimic sounds like a humming refrigerator or air conditioner, a hissing radiator, or even a whirring fan. ... more natural-sounding characteristics. “Both brown and pink ...

5. Additive white Gaussian noise - Wikipedia

   en.wikipedia.org/wiki/Additive_white_Gaussian_noise

   Additive white Gaussian noise (AWGN) is a basic noise model used in information theory to mimic the effect of many random processes that occur in nature. The modifiers denote specific characteristics: Additive because it is added to any noise that might be intrinsic to the information system.

6. Noise spectral density - Wikipedia

   en.wikipedia.org/wiki/Noise_spectral_density

   It is commonly used in link budgets as the denominator of the important figure-of-merit ratios, such as carrier-to-noise-density ratio as well as E b /N 0 and E s /N 0. If the noise is one-sided white noise , i.e., constant with frequency, then the total noise power N integrated over a bandwidth B is N = BN 0 (for double-sided white noise, the ...

7. Noise (electronics) - Wikipedia

   en.wikipedia.org/wiki/Noise_(electronics)

   Different types of noise are generated by different devices and different processes. Thermal noise is unavoidable at non-zero temperature (see fluctuation-dissipation theorem), while other types depend mostly on device type (such as shot noise, [1] [3] which needs a steep potential barrier) or manufacturing quality and semiconductor defects, such as conductance fluctuations, including 1/f noise.