sone sondheim • soneri · · · Info · Definitions · Characters · · sone · · Text Latin · · Script 4 · · Length 1 · · Syllables Definitions · · · (noun) a unit of perceived loudness equal to the loudness of a 1000-hertz tone at 40 dB above threshold. · · Noun Definition 1 Characters · · e latin small letter e U+0065 n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073