The Study on Intraoral Pressure, Closure Duration and VOT During Phonation of Korean Bilabial Stop Consonants

,; ,

J Korean Soc Laryngol Phoniatr Logop > Volume 7(1); 1996 > Article

Journal of The Korean Society of Laryngology, Phoniatrics and Logopedics 1996;7(1): 50-55.

한국어 양순 파열음 발음시 구강내압과 폐쇄기, VOT에 대한 연구

표화영, 최홍식

연세대학교 이비인후과학교실, 음성언어의학연구소

The Study on Intraoral Pressure, Closure Duration and VOT During Phonation of Korean Bilabial Stop Consonants

;;

ABSTRACT

Acoustic analysis study was performed on 20 normal subjects by speaking nonsense syllables composed of Korean bilabial stops$(/P, P^{star}, P^{h}/)$ and their preceding and/or following vowel /a/ (that is, $[pa, p^{star}a, p^{h}a, apa, ap^{star}a, ap^{h}a]$) with an ultraminiature pressure, sensor. in their mouths. Speech materials were phonated twice, once with a moderate voice, another time with a loud voice. The acoustic signal and intraoral pressure were recorded simultaneously on computer. By these procedures, we were to measure the intraoral pressure, closure duration and VOT of Korean bilabial stops, and to compare the values one another according to the intensity of phonation and the position of the target consonants. Intraoral pressure was measured by the peak intraoral pressure value of Its wave closure duration by the time interval between the onset of intraoral pressure build-up and the burst meaning the release of closure ; Voice onset time(VOT) on by the time interval between the burst and the onset or glottal vibration. Heavily aspirated bilabial stop consonant /$p^h$/ showed the highest intraoral pressure value, unaspirated /$p^{star}$/, the second, slightly aspirated /P/, the lowest. The syllable initial bilabial stops showed higher intraoral pressure than word initial stops, and the value of loudly phonated consonants were higher than moderate consonants. The longest closure duration period was that of /$p^{star}$/ and the shortest, /P/, and the duration was longer in word initial position and in the moderate voice. In VOT, the order of the longest to shortest was $/{p^h}/, /p/, /{p^star}/$, and the value was shorer when the consonant was in intervocalic position and when it was phonated with a loud voice.

KEY WORDS： Korean stops;Bilabials;Intraoral pressure;VOT;Closure duration;