Effects of Word Stress on Vowel Duration and Vowel Quality in the Speech of Korean Learners of English
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Unstressed English vowels are reduced in their durational and spectral aspects. Vowel reduction in relation to word stress in English has been one of the challenges faced by Korean learners of English in learning English vowel system. In this study, we investigated effects of word stress on the vowel duration and vowel quality. This study focused on two unstressed vowels (/ə/ and /ɪ/) and three stressed vowels (/ʌ/, /ɪ/, and /i/). Words with five target vowels in the first syllable of word were collected from sentences produced by two subject groups. Vowel durations and first and second formant values were calculated and analyzed for the effect of stress which interplayed with intrinsic vowel duration and vowel quality. Study results indicated that speech data of Korean learners of English had much less magnitude in vowel shortening and reduction of vowel quality in unstressed vowels than those of English speakers. In addition, the five target vowels tended to be grouped into two in vowel space for Korean learners of English. Pedagogical implications of this study are discussed to improve learning and teaching English vowel system for Korean learners of English.
Abstract
Unstressed English vowels are reduced in their durational and spectral aspects. Vowel reduction in relation to word stress in English has been one of the challenges faced by Korean learners of English in learning English vowel system. In this study, we investigated effects of word stress on the vowel duration and vowel quality. This study focused on two unstressed vowels (/ə/ and /ɪ/) and three stressed vowels (/ʌ/, /ɪ/, and /i/). Words with five target vowels in the first syllable of word were collected from sentences produced by two subject groups. Vowel durations and first and second formant values were calculated and analyzed for the effect of stress which interplayed with intrinsic vowel duration and vowel quality. Study results indicated that speech data of Korean learners of English had much less magnitude in vowel shortening and reduction of vowel quality in unstressed vowels than those of English speakers. In addition, the five target vowels tended to be grouped into two in vowel space for Korean learners of English. Pedagogical implications of this study are discussed to improve learning and teaching English vowel system for Korean learners of English.
참고문헌 (17)
- Braun, B., "Perceiving unstressed vowels in foreign-accented English", Journal of the Acoustical Society of America, 129(1), pp.376~387 (2011)
- Cooper, N., "Constraints of lexical stress on lexical access in English: Evidence from native and non-native listeners", Language and Speech, 45, pp.207~228 (2002)
- Cutler, A., "Forbear is a homophone: lexical prosody does not constrain lexical access", Language and Speech, 29, pp.201~220 (1986)
- Cutler, A, "The handbook of English pronunciation", pp.106~124 (2015), John Wiley &Sons, Inc
- Cutler, A., "Attention and performance X", pp.183~196 (1984), Erlbaum
- Dauer, R. M., "Stress-timing and syllable-timing reanalyzed", Journal of Phonetics, 11, pp.51~62 (1983)
- Deterding, D, "Misunderstandings in English as a lingua franca: An analysis of ELF interactions in South-East Asia" (2013), Walter de Gruyter
- Fry, D. B., "Duration and intensity as physical correlates of linguistic stress", Journal of the Acoustical Society of America, 27, pp.765~768 (1955)
- Ghosh, M., "Vowel quality and direction of stress shift in a predictive model explaining the varying impact of misplaced word stress: Evidence from English", Fronters in Communication, 6, pp.1~18 (2021)
- Grabe, E., "Durational variability in speech and the rhythm class hypothesis", Laboratory Phonology, 7, pp.515~546 (2002)
- Harris, M. S., "Effect of speaking mode on temporal factors in speech: Vowel duration", Journal of the Acoustical Society of America, 56, pp.1016~1018 (1974)
- Klatt, D. H., "Linguistic uses of segmental duration in English: Acoustic and perceptual evidence", Journal of the Acoustical Society of America, 59(5), pp.1208~1221 (1976)
- Ladefoged, P, "A course in phonetics" (2006), Thomson Wadsworth
- Lee, Hae-Bong, "The mispronunciation of English sounds by Korean and Japanese speakers of English", Modern English Education, 5(1), pp.167~183 (2004)
- Lewis, C., "Word stress and pronunciation teaching in English as a Lingua Franca contexts", The CATESOL Journal, 30, pp.161~176 (2018)
- Umeda, N., "Vowel duration in American English", Journal of the Acoustical Society of America, 58, pp.434~445 (1975)