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KMID : 0917519990050020139
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Journal of Speech Sciences
1999 Volume.5 No. 2 p.139 ~ p.159
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Some Acoustical Aspects of Korean Stops in Various Utterance Positions
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Abstract
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The purposes of this study are two-folds: to find out the acoustic features of Korean stops in various utterance positions and their influence on the neighbouring segments. Korean stops(/p, p´, p^h+, t, t´, t^h-, k, k´, k^h/) are examined from CV, V_1CV_2, V_1NCV_2, V_1LCV_2 sequences. Three speakers (two male and one female speakers of Seoul dialect) served as subjects for the present study. VOT, closure duration of the target stops and duration of the neighbouring segments were measured from acoustic data. The results can be summarized as follows. first, stops show different temportal aspects depending on their place of articulation as well as their voice types. Velar stops tend to have shorter closure duration and longer VOT due to relatively slower movement of the articulator (i.e. tongue body) and higher supraglottal air pressure during the closure, respectively. Second, temporal aspects of the neighbouring segments appear to be influenced by the voice type of stop. The preceding segment tends to be longer when a stop has shorter duration. On the other hand, the following segment tends to be shorter, when a stop has longer VOT.
Keywords: stops, closure duration, VOT, contextual influence, temporal characteristics
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