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In telecommunication, a disturbance voltage is an unwanted voltage induced in a system by natural or man-made sources.
Note: In telecommunications systems, the disturbance voltage creates currentss that limit or interfere with the interchange of information. An example of a disturbance voltage is a voltage that produces (a) false signals in a telephone, (b) noise in a radio receiver, or (c) distortion in a received signal.
Source: from Federal Standard 1037C
