instantaneous sound pressure instantaneousness • instant coffee · · · Info · Definitions · Synonyms · Characters · · instantaneous sound pressure · · Text Common · · Latin · · Scripts 28 · · Length 7 · · Syllables Definitions · · · (noun) the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point. Synonyms: sound pressure, instantaneous sound pressure. · · Noun Definition 1 Synonyms · · · sound pressure · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075