Colors of noise: Difference between revisions

Revision as of 19:27, 30 January 2007

Revision as of 20:58, 30 January 2007

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{{ColoursColors of noise}}

Although [[noise]] is a [[random]] [[signal]], it can have characteristic statistical properties. [[Spectral density]] ([[Power (physics)|power]] distribution in the [[frequency spectrum]]) is such a property, which can be used to distinguish different types of noise. This classification by spectral density is given "color" terminology, with different types named after different [[colors]], and is common in different disciplines where noise is an important factor (like [[acoustics]], [[electrical engineering]] and [[physics]]).

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== Technical definitions ==

The colourcolor names for these different types of sounds are derived from a loose analogy between the spectrum of frequencies of sound wave present in the sound (as shown in the blue diagrams) and the equivalent spectrum of light wave frequencies. That is, if the sound wave pattern of "blue noise" were translated into light waves, the resulting light would be blue, and so on.

; White noise

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== Others ==

There are also many "less official" colourscolors.

; Red noise