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KMID : 1022420130050030011
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Phonetics and Speech Sciences
2013 Volume.5 No. 3 p.11 ~ p.20
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An Acoustical Analysis of English Stops at the Initial and After-initial-/s/ Positions by Korean and American Speakers
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Yang Byung-Gon
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Abstract
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The purpose of this study is to compare the acoustic parameters of English stop consonants at the initial and after-initial-/s/ positions in a message produced by 47 Korean and American speakers in order to provide better pronunciation skills of English stops for Korean learners. A Praat script was developed to obtain voice onset time (VOT), maximum consonant intensity (maxCi), and rate of rise (ROR) from six target words with stops at the positions in the message. Results show that VOT and maxCi were significantly different between the two language groups while ROR wasn’t. The Korean speakers generally produced the stop consonants with longer VOTs and higher consonant intensity. From the comparison of consonant groups at the two different positions, the Korean participants did not distinguish them as clearly as the American participants did at the after-initial-/s/ position. Finally a comparison of each language and sex group revealed that the major difference was attributed to stop consonants in the after-/s/ position. The author concluded that Korean speakers should be careful not to produce all the stops with longer VOTs and higher intensity. Further studies would be desirable to examine how Americans evaluate Korean speakers’ English proficiency with modified acoustic values of English stops.
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KEYWORD
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English stop consonants, after initial /s/, VOT, maximum consonant intensity, rate of rise, Korean speakers
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