background noise

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Noun1.background noise - extraneous noise contaminating sound measurements that cannot be separated from the desired signal
ground noise
background signal, background - extraneous signals that can be confused with the phenomenon to be observed or measured; "they got a bad connection and could hardly hear one another over the background signals"
surface noise - noise produced by the friction of the stylus of a record player moving over the rotating record
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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