| Definition: | the voltage, at a specified point in a channel or telephone set, which is equal to the square root of the sum of the squares of the effective voltages of the spectral components of a disturbance induced in the channel or set, each voltage being weighted to take account of the corresponding frequency
NOTE – For telephony, the conventional weighting is given in the CCITT Recommendation 0.41 from the Fascicle IV-4 of the Blue Book, 1989.
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