speech spectrum speech sound • speech therapist · · · Info · Definitions · Characters · · speech spectrum · · Text Common · · Latin · · Scripts 15 · · Length 3 · · Syllables Definitions · · · (noun) the average sound spectrum for the human voice. Synonyms: speech spectrum. · · Noun Definition 1 Characters · · space U+0020 c latin small letter c U+0063 e latin small letter e U+0065 h latin small letter h U+0068 m latin small letter m U+006D 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