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White noise is random sound that contains an equal amount of all the frequency components across the spectrum one is testing. It sounds sorta like the hiss one hears when a television is tuned to a blank channel (if the television doesn't automatically mute the sound when no signal is present, however). If one has white noise and examines the signal level of, say, the 55 cycle per second signal component, it will be the same as, say, the 927 cycle per second signal component, or the 2651 cycle per second signal component. Check this out: http://en.wikipedia.org/wiki/White_noise

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17y ago

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