noise level noiselessness • noisemaker · · · Info · Definitions · Synonyms · Characters · · noise level · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) the amplitude level of the undesired background noise. Synonyms: noise level, background level. · · Noun Definition 1 Synonyms · · · background level · · Synonym 1 Characters · · space U+0020 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 v latin small letter v U+0076