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A word used to describe signals which humans consider to contain little useful information, or which they actually find unpleasant. There are some synthetic types of noise which are useful in sound synthesis and technical equipment alignment etc. These are called white noise, pink noise and (the author has heard) blue noise. White noise contains all frequencies in equal amplitude distribution (and the metaphor is from white light which has a similar attribute). Pink noise is filtered white noise (some frequencies removed) and other colours of the noise rainbow represent other filterings. |
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