An acoustic and perceptual investigation of the vowel length contrast in Korean

다국어 초록 (Multilingual Abstract)

The goal of the current study is to investigate how the sound change is reflected in production or in perception, and what the effect of lexical frequency is on the loss of sound contrasts. Specifically, the current study examined whether the vowel length contrasts are retained in Korean speakers’ productions, and whether Korean listeners can distinguish vowel length minimal pairs in their perception. Two production experiments and two perception experiments investigated this. For production tests, twelve Korean native speakers in their 20s and 40s completed a read-aloud task as well as a map-task. The results showed that, regardless of their age group, all Korean speakers produced vowel length contrasts with a small but significant differences in the read-aloud test. Interestingly, the difference between long and short vowels has disappeared in the map task, indicating that the speech mode affects producing vowel length contrasts. For perception tests, thirty-three Korean listeners completed a discrimination and a forced-choice identification test. The results showed that Korean listeners still have a perceptual sensitivity to distinguish lexical meaning of the vowel length minimal pair. We also found that the identification accuracy was affected by the word frequency, showing a higher identification accuracy in high- and mid- frequency words than low frequency words. Taken together, the current study demonstrated that the speech mode (read-aloud vs.
spontaneous) affects the production of the sound undergoing a language change; and word frequency affects the sound change in speech perception.

참고문헌 (Reference)

1 박주경, "현대 한국어의장단음에 관한 연구" 11 (11): 121-131, 1985

2 김한샘, "현대 국어 사용 빈도 조사 2" 국어연구원 2005

3 이숭녕, "국어학논고" 동양출판사 1960

4 정명숙, "국어 한자어의 장단음에 대한 실험음성학적 연구" 42 : 285-299, 2000

5 DiCanio, C., "Vowel variability in elicited versus spontaneous speech : evidence from Mixtec" 48 : 45-59, 2015

6 Koopmans-Van Beinum, F. J., "Vowel contrast reduction:An acoustic and perceptual study of Dutch vowels in various speech conditions" University of Amsterdam 1980

7 DiCanio, C., "The interaction of vowel length and speech style in an Arapaho speech corpus" University of Glasgow 2015

8 Kirchner, R., "The Oxford Handbook of Laboratory Phonology" Oxford University Press 2012

9 Lee, G., "Production and perception of Korean and English word level prominence by Korean speakers" University of Kansas 2015

10 Boersma, P., "Praat: doing phonetics by computer [Computer program]. Version 6.0.15"

11 Bybee, J., "Phonology and language use" Cambridge University Press 2001

12 Ohala, J. J., "Papers from the Parasession on Language and Behavior" Chicago Linguistic Society 178-203, 1981

13 Elert, C. C., "Monografier utivna av Stockholms kommunalförvaltning: 27" Almqvist och Wiksell 1965

14 Baayen, R. H., "Mixed-effects modeling with crossed random effects for subjects and items" 59 (59): 390-412, 2008

15 Kenstowicz, Michael, "Laryngeal Features and Tone in Kyungsang Korean: A Phonetic Study" 한국음운론학회 12 (12): 247-264, 2006

16 Pierrehumbert, J. B., "Laboratory Phonology 7" Mouton de Gruyter 101-140, 2002

17 Pierrehumbert, J. B., "Frequency effects and the emergence of linguistic structure" John Benjamins 137-157, 2001

18 Bybee, J., "Frequency and the emergence of linguistic structure" John Benjamins Publishing Company 1-24, 2001

19 Kang, Y., "Frequency Effects on Vowel Length Contrast Merger in Seoul Korean" 6 (6): 469-503, 2015

20 Hirata, Y., "Effects of speaking rate on the vowel length distinction in Japanese" 32 : 565-589, 2004

21 Ernestus, M., "Acoustic reduction and the roles of abstractions and exemplars in speech processing" 142 : 27-41, 2014

22 Ko, E. S., "A metrical theory of Korean word prosody" 30 (30): 79-115, 2013

23 Lee, K., "A history of the Korean language" Cambridge University Press 2011

24 차재은, "1930년대의 한국어 음장에 대한 연구 - <보통학교 조선어독본>의 음성 자료를 중심으로 -" 민족문화연구원 (43) : 105-128, 2005