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C-Message NoiseThe term "C-Message Noise" denotes the frequency weighted average noise within an idle voice channel. The frequency weighting, called C-message, is used to simulate the frequency characteristic of the 5OO-type telephone set and the hearing of the average subscriber.
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C-Message NoiseThe frequency-weighted, short-term average noise within an idle channel. Frequency weighting, called C-message, is used to account for the variations in 500-type telephone set transducer efficiency an [..]
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