White Noise Definition

A sound containing a blend of all the audible frequencies distributed equally over the range of the frequency band.
Webster's New World
Constant background sound or sounds, as from an appliance, traffic, etc.
Webster's New World
Recorded sound or sounds intended to serve as background noise, as in an effort to create a relaxing atmosphere or to mask other noises.
Webster's New World

Origin of White Noise

  • From the analogy with white light

    From American Heritage Dictionary of the English Language, 5th Edition

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white noise