4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

Acoustic Properties of Phonemes in Continuous Speech for Different Speaking Rate

Hisao Kuwabara

Department of Electronics and Information Science, The Nishi-Tokyo University, Kitatsuru-gun, Yamanashi, Japan

An investigation has been made for individual phonemes focusing mainly on their duration in continuous speech spoken in different rates: fast, normal, and slow. Fifteen short sentences uttered by four male speakers have been used as the speech material which comprises a total of 291 morae. Normal speaking rate (n-speech) is, on average, 150 milliseconds/mora (or 400 morae/minute) and the four speakers have been asked to read the sentences twice as fast as (f-speech) and 1/2 limes as slow as (s-speech) the normal speed in reference to the n-speech. Among consonants, the greatest influence has been found to occur on the syllabic nasal /N/ and the least on the voiceless stop /t/ in f-speech. For the s-speech, /N/ has also been found to be the greatest but the least is voiced stop /d/. The ratio of duration between consonant and vowel of a CV-syllable in the f-speech is kept almost the same as that in the n-speech while vowel lengthening becomes significantly large in the s-speech.

Full Paper

Bibliographic reference.  Kuwabara, Hisao (1996): "Acoustic properties of phonemes in continuous speech for different speaking rate", In ICSLP-1996, 2435-2438.