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Journal of The Korean Society of Laryngology, Phoniatrics and Logopedics 2006;17(2): 98-102. |
| 후두질환에 따른 자음의 음성발현시간의 특성 |
| 홍기환, 이화욱, 김진성, 이은정, 소상수, 최동일, 양윤수 |
| 전북대학교 의과대학 이비인후과학교실 |
| The Characteristics of Voice Onset Time of the Korean Stops in the Benign Laryngeal Disorders |
| Ki-Hwan Hong, Hwa-Uk Lee, Jin-Sung Kim, Eun-Jung Lee, Sang-Soo So, Dong-Il Choi, Yoon-Soo Ynng |
| Department of Otolaryngology-HNS, Medical School, Chonbuk National University |
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| ABSTRACT |
Background and Objectives
: Voice onset time(VOT) is defined as the time interval from oral release of a stop consonant to the onset of glottal pulsing in the following vowel. VOT is a temporal characteristics of stop consonants that reflects the complex timing of glottal articulation relative to supraglottal articulation. Stop consonants are characterized by creation of a pressure difference across a complete occlusion in the vocal tract, followed by a sudden release 'burst' due to opening that occlusion. The objects of this study is to evaluate a usefulness of voice onset time in the assessment of voice disorderd patients. Subjects : Subjects were 20 adults with normal voice and with benign laryngeal disorders. Subjects with voice disorders represented the following vocal pathologies : vocal polyp, vocal nodule, Reinke's edema and unilateral vocal fold paralysis(UVFP). Control subjects were matched for age (21-40 yews old) and sex(male) with the voice disorders subjects and had normal vocal qualities with no history of voice disorders. Methods : Each voice-disordered and matched control subject read the test passages containing three types of Korean bilabial consonants. VOT measures were made for the initial $/p/p^h/;and;/p'/$. VOT was measured using acoustic waveform or wide band spectrogram.
Results
: For each voiceless stop consonants, there was a significant difference in VOT between the voice disordered and normal subjects. The mean VOTs of the lax stops in UVFP was significantly shorter than those of control subjects in the UVFP. The mean VOTs of the aspirated stops in the vocal polyp and nodule were longer than those of control subjects, but not significant. The mean VOTs of the glottalized in voice disordered groups were longer than those of control subjects, and significant statistically in the UVFP.
Conclusion
s : VOT may be a clinically useful acoustic parameter in the assessment of voice disordered patients, especially in the unilateral vocal fold paralysis. |
| KEY WORDS：
Voice onset time;Benign laryngeal disorders; |
| 중심 단어：
음성발현시간;양성후두질환; |
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