• 말소리와 음성과학
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• 제7권3호
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• pp.45-53
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• 2015

The current study investigated CVCC syllables in spontaneous American English speech to find out whether such syllables are produced as phonological units with a string of segments, showing a hierarchical structure. Transcribed data from the Buckeye Speech Corpus was used for the analysis in this study. The result of the current study showed that the constituents within a CVCC syllable as a phonological unit may have phonetic variations (namely, the final coda may undergo deletion). First, voiceless alveolar stops were the most frequently deleted when they occurred as the second final coda consonants of a CVCC syllable; this deletion may be an intermediate process on the way from the abstract form CVCC (with the rime VCC) to the actual pronunciation CVC (with the rime VC), a production strategy employed by some individual speakers. Second, in the internal structure of the rime, the proportion of deletion of the final coda consonant depended on the frequency of the word rather than on the position of postvocalic consonants on the sonority hierarchy. Finally, the segment following the consonant cluster proved to have an effect on the reduction of that cluster; more precisely, the following contrast was observed between obstruents and non-obstruents, reflecting the effect of sonority: when the segment following the consonant cluster was an obstruent, the proportion of deletion of the final coda consonant was increased. Among these results, the effect of word frequency played a critical role for promoting the deletion of the second coda consonant for clusters in CVCC syllables in spontaneous speech. The current study implies that the structure of syllables as phonological units can vary depending on individual speakers' lexical representation.

• 재활복지
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• 제18권4호
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• pp.295-314
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• 2014

본 연구는 난청인이 오류를 보이는 음소들의 유형과 오류율을 확인하여 청능재활 현장에서 한국자음지각검사(KCPT)를 더욱 잘 활용할 수 있도록 기초자료를 제공하는데 목적이 있다. 30명의 감각신경성난청인을 대상으로, KCPT를 실시하여 오류유형, 화자에 따른 KCPT 점수의 변화 등을 알아보았다. 오류유형의 경우 30% 이상의 오류율을 보인 음소는 초성검사문항의 경우 /ㄷ/, /ㅂ/, /ㅃ/, /ㅉ/, /ㅌ/이었으며, /ㅊ/을 제외한 모든 음소에서 10% 이상의 오류율을 보였다. 종성검사문항에서 30% 이상의 오류율을 보인 음소는 /ㄱ/과 /ㄷ/ 이었다. 오류유형을 살펴보면 초성검사문항에서는 초성자음대치, 종성검사문항에서는 종성자음대치가 가장 많은 것으로 나타났으며, 각 검사문항이 초성 및 종성에 대한 검사에 적절한 도구임을 확인하였다. 또한 KCPT를 발화하는 화자가 남성 또는 여성으로 바뀌어도 점수에는 유의한 차이를 보이지 않는 것으로 나타나서 재활현장에서 화자의 성별에 관계없이 KCPT를 활용할 수 있음을 확인하였다.

• 말소리와 음성과학
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• 제5권3호
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• pp.11-20
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• 2013

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.

• 대한음성학회지:말소리
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• 제38호
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• pp.99-112
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• 1999

The aim of this paper is to measure the duration of Japanese 'sokuon' [t/k] and 'haneruon' [m/n] produced by Korean and Japanese native speakers. It was shown that in the case of Korean speakers, the duration of geminate of 'sokuon' was 1.5 times longer than that of a single consonant, whereas in the case of Japanese speakers, it was 2 times longer. The difference between Korean and Japanese prosodic structures appears to affect the perception and acquisition of a foreign rhythmic patternm non-existent in the speaker's native tongue. The duration of geminate of [s] was 2 times as long as a single consonant in both Korean and Japanese speakers' production. On the average, the duration of Japanese 'sokuon' [t/k/s] was 1.7 times longer than that of a single consonant in Korean speakers' pronunciation, whereas 2 times longer in Japanese speakers' pronunciation. The production of 'haneruon' by either Korean or Japanese speakers yielded a similar result to 'sokoun': 1) geminates lasted longer than a single consonant; 2) single [m] is longer than single [n]: 3) geminate of [n] is 3 times as long as single [n], whereas geminate of [m] is 2 times as long as single [m].

• 한국음향학회:학술대회논문집
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• 한국음향학회 1999년도 학술발표대회 논문집 제18권 2호
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• pp.325-328
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• 1999

The aim of this paper is to measure the duration of Japanese 'sokuon' [t/k] and 'haneron' [m/n] pronounced by Korean and Japanese. It is revealed in this study that gemination of the Japanese 'sokuon' in Korean pronunciation lasts 1.5 times longer than a single consonant, whereas it lasts 2 times longer in Japanese pronunciation. The difference between Korean and Japanese seems to show the difficulty of perceiving and learning a foreign rhythmic pattern non-existent in the leaner's language. The gemination of [s] phoneme lasts 2 times as long as a single consonant in both Korean and Japanese pronunciation. On average, the duration of Japanese 'sokuon' [t/k/s] is 1.7 times longer than a single consonant in Korean pronunciation, whereas 2 times longer in Japanese pronunciation. The pronunciation of Japanese 'haneruon' by either Korean or Japanese produces a similar result: 1) gemination lasts longer than a single consonant, 2) the duration of the single [m] is longer than that of the single [n]; 3) gemination of [n] is 3 times as long as a single [n], whereas gemination of [m] is 2 times as long as a single [m].

• 한국문헌정보학회지
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• 제1권
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• pp.1-58
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• 1970

As to the structure of author tables for the Korean libraries using the Korean alphabet Hangul for filing, no other system is understood more relevant to author notations than the analytico-synthetic system. The Korean character consists of syllables respectively dividual into 'consonant+vowel' or 'consonant+vowel+consonant,' with the first element a consonant and the second a vowel. When these elements are synthesized with figure representation, they make an enumerative two-figure table. Individualizing and assigning, therefore, are done without listing many en-tries on the table or looking up notations in ready-made enumerative author tables. We still do not have general agreements in form of entry, reading of the Japanese and Chinese names, transliteration of foreign words, and filing system. What is more, so flexible and hospitable a notation system should be adopted as to meet the anticipated changes. The writer introduces an author notation system that could make 150,000 divisions by combinating figures, thus making it possible to endure changes through readjustments. It is considered effective, convenient, and efficacious for individualization.

• 음성과학
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• 제9권4호
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• pp.59-75
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• 2002

Aerodynamic analysis study was performed on 14 normal subjects (2 males, 12 females) with nonsense syllables composed of Korean bilabial stops (/p, p', $p^{h}$) and their preceding and/or following vowels, /i, a, u/. That is, [pi, p'i, $p^{h}i$, pa, p'a, $p^{h}a$, pu, p'u, $p^{h}u$, ipi, apa, upu, $ip^{h}i$, $ap^{h}a$, $up^{h}u$, ip'i, ap'a, up'u]. All measures were taken and analysed using Aerophone II voice function analyzer and included peak air pressure, mean air pressure, maximum flow rate, volume, mean SPL and phonatory SPL. A t-test and one-way ANOVA were employed for analysis. A post-hoc analysis was performed with Scheffe and Bonferroni. The results were as follows: First, MSPL. and MAP of /p, p', $p^{h}$/ were significantly different in different positions (initial and medial position). In addition, different vowel environment also produced significantly different aerodynamic characteristics those consonants. Especially the lax consonant /p/ was significantly different /i, a, u/ vowel environments. The tense consonant /p'/ was significantly different only /i/ vowel environment.

• 대한후두음성언어의학회지
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• 제8권1호
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• pp.18-26
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• 1997

There are two types of phonetic study, acoustic and physiologic, for differentiating the three manner categories of Korean stop consonants. On the physiologic studies, there are endoscopic, electromyographic(EMG), electroglottographic(EGG) and aerodynamic studies. In this study, I tried to investigate general features of Korean stops using EGG study for the open quotient of vocal fold and baseline shift during speech, and aerodynamic characteristics for e subglottal air pressure, air flow and glottal resistance at consonants. On the aerodynamic study, the glottalized and aspirated stops may be characterized by e increasing subglottal pressure comparing with lenis stop at consonants. The airflow is largest in the aspirated stops followed by lenis stops and glottalized. The glottal airway resistance (GAR) showed highest in the glottalized followed by the lenis, but lowest in e aspirated during e production of consonants, and showed highest in e aspirated, but low in the glottalized and lenis during the production of vowel. The glottal resistance at consonant showed significant difference among consonants and significant interaction between subject and types of consonant. The glottal resistance at vowel showed significant difference among consonants, and e interaction occured between subject and types of consonant. The electroglottography(EGG) has been used for investigating e functioning of e vocal folds during its vibration. The EGG should be related to the patterns of the vocal fold vibration during phonation in characterizing the temporal patterns of each vibratory cycle. The purpose of this study is to investigate the dynamic change of EGG waveforms during continuous speech. The dynamic changes of EGG waveforms fir the three-way distinction of Korean stops were characterized that the aspirated stop appears to be characterized by largest open quotient and smallest glottal contact area of the vocal folds in e initial portion of vocal fold vibration ; the lenis stop by moderate open quotient and glottal contact area ; but the glottalized stop by smallest open quotient and largest glottal contact area. There may be close relationship between the OQ(open quotient) in the initial voice onset and the glottal width at the time of consonant production, the larger glottal width just before vocal fold vibration results in the smaller OQ of the vocal fold vibration in the initial voice onset. The EGG changes of baseline shift during continuous speech production were characterized by the different patterns for the three types of Korean consonants. The small and less stiffness change of baseline shift was found for the lenis and the glottalized, and the largest and stiffest change was found for the aspirated. On the baseline shift for the initial voice onset, they showed so similar patterns with for the consonant production, larger changed in the aspirated. for the lenis and the glottalized during the initial voice onset, three subjects showed individual difference each other. I suggest at s characteristics were strongly related with articulatory activity of vocal tract for the production of consonant, especially for the aspirated stop. The suspecting factors to affect EGG waveforms are glottal width, vertical laryngeal movement and the intrapharyngeal pressure to neighboring tissue during connected spech. So the EGG may be an useful method to describe laryngeal activity to classify pulsing conditions of the larynx during speech production, and EGG research can be controls for monitoring the vocal tract articulation, although above factors to affect EGG would have played such a potentially role on vocal fold vibratory behavior obtained using consonant production.

• 한국음향학회지
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• 제19권6호
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• pp.28-33
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• 2000

낱말 내에서 선행음절말-후속음절초로 연이어 나타나는 일종의 쌍자음(geminate)의 지속시간 차이를 고찰하고자 한다. (ㅁ-ㅁ) 연쇄와 (ㄴ-ㄴ) 연쇄를 중심으로 논의하였다. 한 낱말 내에서 선행하는 양순 비음 (ㅁ)과 이를 뒤따르는 양순 비음(ㅁ) 사이에 통계적으로 유의한 차이는 없다고 볼 수 있으나, 선행하는 자음의 지속시간이 약간 짧아지는 경향이 관찰되었다. 치조비음 (ㄴㄴ) 연쇄의 경우, 전반적으로, 한 낱말 내에서 선행하는 치조 비음과 이를 뒤따르는 치조 비음 사이에는 통계적으로 차이가 있으며, 선행하는 자음의 지속시간이 좀 더 길어지는 경향이 있다고 정리할 수 있다.

• 대한청각학회지
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• 제25권3호
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• pp.124-130
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• 2021

Background and Objectives: The study investigated vowel context effects on the perception of stop consonants in Malayalam. It also probed into the role of vowel context effects in determining the frequency of occurrence of various consonant-vowel (CV) syllables in Malayalam. Subjects and Methods: The study used a cross-sectional pre-experimental post-test only research design on 30 individuals with normal hearing, who were native speakers of Malayalam. The stimuli included three stop consonants, each spoken in three different vowel contexts. The resultant nine syllables were presented in original form and five gating conditions. The consonant recognition in different vowel contexts of the participants was assessed. The frequency of occurrence of the nine target syllables in the spoken corpus of Malayalam was also systematically derived. Results: The consonant recognition score was better in the /u/ vowel context compared with /i/ and /a/ contexts. The frequency of occurrence of the target syllables derived from the spoken corpus of Malayalam showed that the three stop consonants occurred more frequently with the vowel /a/ compared with /u/ and /i/. Conclusions: The findings show a definite vowel context effect on the perception of the Malayalam stop consonants. This context effect observed is different from that in other languages. Stop consonants are perceived better in the context of /u/ compared with the /a/ and /i/ contexts. Furthermore, the vowel context effects do not appear to determine the frequency of occurrence of different CV syllables in Malayalam.