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KMID : 0362420100480010069
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Journal of Korean Academy of Prosthodontics
2010 Volume.48 No. 1 p.69 ~ p.74
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The effect of palatal height on the Korean vowels
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Chung Bo-Yoon
Lim Young-Jun
Kim Myung-Joo
Nam Shin-Eun
Lee Seung-Pyo
Kwon Ho-Beom
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Abstract
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Purpose: The purpose of this study was to analyze the influence of palatal height on Korean vowels and speech intelligibility in Korean adults and to produce baseline data for future prosthodontic treatment.
Materials and Methods : Forty one healthy Korean men and women who had no problem in pronunciation, hearing, and communication and had no history of airway disease participated in this study. Subjects were classified into H, M, and L groups after clinical determination of palatal height with study casts. Seven Korean vowels were used as sample vowels and subjects’ clear speech sounds were recorded using Multispeech software program on computer. The F1 and the F2 of 3 groupswere produced and they were compared. In addition, the vowel working spaces of 3 groups by /a/, /i/, and /u/ corner vowels were obtained and their areas were compared. Kruskal-Wallis test and Mann-Whiteny U test were used as statistical methods and P < .05 was considered statistically significant.
Results: There were no significant differences in formant frequencies among 3 groups except for the F2 formant frequency between H and L group (P = .003). In the analysis of vowel working space areas of 3 groups, the vowel working spaces of 3 groups were similar in shape and no significant differences of their areas were found.
Conclusion: The palatal height did not affect vowel frequencies in most of the vowels and speech intelligibility. The dynamics of tongue activity seems to compensate the morphological difference.
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KEYWORD
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Palatal height, Vowel, formant, Vowel working space
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