일반 노년층 파열음의 음향학적 특성
Acoustic Characteristics of Stop Consonants in Normal Elderly
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초록
Changes in speech production in normal elderly might be subtle and gradual. Therefore, an acoustic analysis is appropriateto identify the effect of aging on speech. For this purpose, this study examined four speech parameters; voice onset time(VOT), VOT range, f0 of following vowel(f0FV), and f0FV difference in two age groups, old (mean age 74.57 yrs.) andyoung (m: 27.43 yrs.). The results show that compared to the older group the younger demonstrated significantly shorterVOTs in lenis and longer in aspirated stop. VOT ranges were relatively broad and consequently overlapped between thephonation types (e.g., lenis, fortis, aspirated). The f0FV values in the older group which are an integral parameter with VOTwere lower compared with the young group. The f0FV differences in the old female group were significantly narrower thanthe young female group, therefore, clear distinction became difficult. In conclusion, contrast in temporal information wasobscured, and the domain of glottal information was diminished on stop consonants in Korean elderly. The findings suggestthat central/peripheral changes by aging could lead to a deficit in coordination between phonation and articulation.
Abstract
Changes in speech production in normal elderly might be subtle and gradual. Therefore, an acoustic analysis is appropriateto identify the effect of aging on speech. For this purpose, this study examined four speech parameters; voice onset time(VOT), VOT range, f0 of following vowel(f0FV), and f0FV difference in two age groups, old (mean age 74.57 yrs.) andyoung (m: 27.43 yrs.). The results show that compared to the older group the younger demonstrated significantly shorterVOTs in lenis and longer in aspirated stop. VOT ranges were relatively broad and consequently overlapped between thephonation types (e.g., lenis, fortis, aspirated). The f0FV values in the older group which are an integral parameter with VOTwere lower compared with the young group. The f0FV differences in the old female group were significantly narrower thanthe young female group, therefore, clear distinction became difficult. In conclusion, contrast in temporal information wasobscured, and the domain of glottal information was diminished on stop consonants in Korean elderly. The findings suggestthat central/peripheral changes by aging could lead to a deficit in coordination between phonation and articulation.
참고문헌 (23)
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