/ Thesaurus / B Synonyms of background noise Find synonyms for: Noun1. background noise, ground noise, background, background signalusage: extraneous noise contaminating sound measurements that cannot be separated from the desired signalWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language