대한후두음성언어의학회지 (Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics)
- 제8권1호
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- Pages.12-17
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- 1997
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- 2508-268X(pISSN)
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- 2508-5603(eISSN)
발성시 음도 및 강도의 변화가 음성분석검사 결과에 미치는 영향
The Effect of Frequency and Intensity of /a/ Phonation on the Result of Acoustic Analysis
초록
Measuring phonatory stability using MDVP(Multi-dimensional voice program, Kay Elemetrics Corp., NJ, USA) are becoming popular in many Korean clinics and laboratories, yet questions about standardization and reference values have remained. The purpose of present study was to examine the effects of frequency and intensity variation on the results of acoustic analysis related to phonatory stability. Twenty young adults(ten females and ten males) were asked to sustain vowel /a/ for more than 3 seconds under 9 different pitch and loudness conditions. Using MDVP, nine voice samples were analyzed, and jitter percent, fundamental frequency variation, shimmer percent, peak amplitude variation, noise to harmonic ratio, amplitude tremor intensity index, and degree of subharmonics were compared. The results showed that intensity changes can significantly affect various phonatory stability measures, and the lowest perturbation values can be obtained from slightly louder(10dB) phonatory condition than comfortable level phonation.