시정의 계절적 변동성 및 대기특성과의 관련성 ( Seasonality and relation to atmospheric characteristics in Visibility )

안미진,윤중섭,조석주,여인학,이민환,김민영 한국대기환경학회 2000 한국대기환경학회 학술대회논문집 Vol.- No.-

Acoustic Distinctions of English /o/ and /ɔ/ Produced by English Speakers and Korean Learners of English

안미진,박은실 한국현대언어학회 2015 언어연구 Vol.30 No.4

This paper is an acoustical study of English vowels/o/ and /ɔ/ produced by native English speakers (NESs) and Korean learners of English (KLEs): it examines F1 and F2 values, duration, and formant movements of the two vowels in a CVC syllable. The results showed that /o/ by NESs (and KLEs) shows neither the typical formant transition of diphthongs nor the typical long vowel duration of diphthongs and thus /o/ occurs as a monphthong in the CVC structure; KLEs’ /o/ and /ɔ/ vowels are less distinct than NESs’ /o/ and /ɔ/ in terms of F1 and F2 values; the differences in F1 and F2 values between the two vowels was 196 Hz and 201 Hz in NESs’ speech but only 85 Hz and 107 Hz in KLEs’ speech; the following consonant type affected the formants difference between /o/ and /ɔ/ in the speech of NESs but not in the speech of KELs; lastly, KLEs pronounce a consonant longer and a vowel shorter than NESs do. (Pai Chai University)

Perception and Production of English Vowels [ɔ] and [o] by Korean Learners of English

안미진 새한영어영문학회 2014 새한영어영문학 Vol.56 No.4

This paper examines how Korean learners of English perceive and produce the English vowels [ɔ] and [o] through vowel identification tests. According to the results of the perception and the production tests, Koreans showed higher accuracy rates in perception than in production of [ɔ] and [o]; Group A with relatively high English proficiency performed better than Group B with relatively low English proficiency in the perception test, but not in the production test; Group B consistently showed higher accuracy in the perception and production tests of [o] than in the same tests of [ɔ]; and the syllable structure of target words also affected the accuracy rates in the perception and production tests and its effects were the same in both tests. The results support Flege et al.’s (1997) claims that the perception precedes the production; and that the performance in perception is correlated to that in production.

Acoustic duration of Korean nasals

안미진 한국음운론학회 2013 음성·음운·형태론 연구 Vol.19 No.3

This paper examines the acoustic duration of Korean nasals in three different positions and three different vowel contexts to find the relationship between the nasal weakening and the nasal duration. Korean nasals have been observed as weakened, orally released or denasalized in the word-initial position (Umeda 1957, Chen and Clumeck 1975, Ohala 1997, Takeyasu 2004, Yoshida 2008, Kim 2011). The experiment in this study reveals that the word-initial nasals are shorter than word-medial and -final nasals; the word-initial nasals are longer before vowel /i/ or /u/ than before vowel /a/; bilabial nasals are longer than alveolar nasals; the word-initial nasals lack clear visible nasal formants and 24% of word-initial nasals are partially voiceless; and alveolar nasals are more frequently devoiced than bilabial nasal in word-initial position. The findings of the experiment support that Korean nasals are weakened with their short acoustic duration in the word-initial position, in which other consonants strengthened with their longer acoustic duration. In addition, the alveolar nasals which are reported as with more frequent nasal weakening or denasalization, turned out to have shorter duration and more frequently devoiced than the other nasals. However, the effect of vowel height on the nasal closure duration suggests that the duration of nasal closure itself cannot be an invariable perceptual cue to nasality and that the quality of the nasal closure is crucial for the perception of nasality.

The nuclear status of onglides in Korean

안미진 한국음운론학회 2011 음성·음운·형태론 연구 Vol.17 No.3

This paper argues that Korean onglides are part of a diphthong; and Korean glides remain in the nucleus position when there is no preceding onset consonant. I examine four different views on Korean onglides: the nucleus hypothesis, the onset hypothesis, the duality hypothesis, and the secondary articulation hypothesis, with data invoking such conflicting views, and provide a new analysis on co-occurrence restriction between a consonant and a glide, glide formation, the phonological grouping of a consonant and a CG sequence from a language game, glide coalescence blocking in Kyungsang Korean, and English loanword adaptation. Under the new approach,none of the previous counter examples prove against the nucleus status of Korean onglides. Korean ideophones and the writing system also support the Korean nuclear onglide.

A Study on Interlanguage Phonetics Based on the Duration Patterns of English Nasals by Korean Learners

안미진 한국현대영어영문학회 2014 현대영어영문학 Vol.58 No.4

This paper examines the interlanguage phonology and phonetic patterns in L2 acquisition and presents the interlanguage phonetic patterns of Korean learners of English (KLE) based on Ahn (2013, 2014)’s experimental results on KLE’s pronunciation of English and Korean nasals. Korean and English are different regarding the phonological patterns and phonetic implementation of nasals. Such differences between the two languages influence KLE’s acquisition of English nasals as a second or foreign language. The patterns of nasal duration revealed that the durational pattern of L2 English nasals is intermingled with L1 pattern, the target language pattern, and others. KLE’s pattern of nasal duration corresponds to Flege (1988)’s claim that the values of phonetic parameters measured in the speech of second language learners are often intermediate between those typical of monolingual speakers of the native and target language.

Not All Heavy Syllables Attract Stress :― Based on a Survey of 136 Stress languages ―

안미진 사단법인 한국언어학회 2003 언어학 Vol.0 No.35

An Acoustic and Perceptual Analysis of Laryngeal Contrasts in Korean Word-Internal Stops

안미진 한국현대언어학회 2018 언어연구 Vol.34 No.2

This paper examines acoustic cues of Korean word-internal stops from the production and perception tests. Korean word-internal lax, aspirated and tense stops were mainly distinguished by closure duration and H1-H2 cues rather than VOT or F0 cues which function as major cues for the contrast of Korean word-initial stops. For the word-internal stop contrast, VOT and F0 cues were weakened or neutralized, but the closure duration cue was somewhat strengthened by its more significant differences among the three stops: the ratios were 1:2.4:2.9. In addition, 50% of lax stops were voiced during their closure. The primary role of the closure duration in perception was confirmed through the stop identification test: 90% of the consonant portions with short closure duration were identified as lax stops. The distinctive values of H1-H2 among the three stops were observed and also contributed to the identification of Korean word-internal stops, especially aspirated vs. tense stops.

Prosodic Effects on Acoustic Cues for the Korean Stop Contrast: Evidence from Daejeon Korean

안미진 언어과학회 2017 언어과학연구 Vol.0 No.82

The paper examines acoustic realization of Daejeon Korean stops in three different prosodic positions, AP-initial, AP-medial, and word-medial. The results showed that Korean stops are differentiated by closure duration, VOT, and F0 and their realizations varied depending on the prosodic position. The distinction of closure duration among stops was prominent word- medially and the different realizations of F0s for stop contrast were prominent word-initially. The F0 contrast between lax and other stops in word-initial position was weakened word-medially and neutralized when they were preceded by word-initial aspirated or tense stops. Daejeon Korean stops showed a VOT merger of lax and aspirated stops in AP-initial and AP-medial position. In addition, VOTs for lax stops were even longer than those for aspirated stops in female AP-initial position.

A Comparative Study on English Nasal Duration between Native English Speakers and Korean Learners of English

안미진 한국현대언어학회 2014 언어연구 Vol.29 No.4

This paper compares the acoustic durations of English nasals produced by English and Korean speakers. The comparison revealed the effects of the position within a word, the place of articulation, and stress on the acoustic duration of English nasals in the data from both native speakers of English and Korean learners of English. Notably, English nasals produced by the Korean subjects were not influenced in duration by word-length while those by native English speakers were affected in all three positions: the shorter the word, the longer the nasals. English nasals produced by English subjects showed greater durational variation due to the position of the stress than those produced by Korean subjects. The word-intial nasals produced by English subjects were longer than the word-medial nasals while the word-initial nasals by Korean subjects were shorter than or as long as the word-medial ones.