• Phonetics and Speech Sciences
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• v.10 no.2
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• pp.15-24
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• 2018

Earlier studies reported that the /o/ and /u/ phonemes of Seoul Korean were currently merging in the F1/F2 space. However, studies on perception tests have shown that rates of correctness were high, even in cases where the two vowels overlapped. This study explores whether there is another acoustic parameter that differentiates /o/ from /u/, besides the F1/F2 contrast. Seventy-five native speakers of Seoul Korean, born between 1953 and 1999, participated in a production test. The data collected were analyzed in terms of F1 and F2, H1-H2, and F0. The result shows that the /o/ and /u/ of female speakers almost overlap in the F1/F2 space for all ages, while H1-H2 values are significantly different between the two vowels regardless of age. On the other hand, the /o/ and /u/ of male speakers are largely well separated in the F1/F2 space, while the H1-H2 values between the two vowels are very close at all ages. F0 effect is relatively small for both male and female speakers, even though there is a statistically significant difference. The result of this study provides evidence that female speakers use phonation differences to distinguish /o/ from /u/, and that the F1/F2 contrast has been replaced by H1-H2 values.

• Annual Conference on Human and Language Technology
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• 2009.10a
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• pp.67-72
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• 2009

ERP의 일종인 MMN(Mismatch Negativity)은 언어의 청각 인지정보 처리과정(central auditory processing)을 규명하는 데 유용한 수단으로 이용되어 왔다. 그런데, 최근의 연구들은 이러한 MMN이 청각 자극뿐만 아니라 시각 자극에 의해서도 검출될 수 있음을 밝혀냈다. 본 연구는 이러한 시각적 MMN을 이용하여 뇌에서 이루어지는 한국어 화자의 무의식적인 한국어 문자 정보처리과정을 규명하려고 시도하였다. 본 연구에서는 한국어의 글말 최소쌍 '므'/'모'와 '므'/'무', 이에 대응되는 비언어자극 '+ㅡ'/'+ㅗ'와 '+ㅡ'/'+ㅜ'(+표시의 아래에 모음을 붙여서 만든 인공문자, 그림1 참고)를 수동적(passive) Oddball paradigm으로 제시하고 언어 자극에 대한 EEG를 비언어자극과 비교 하에 측정, 분석하였다. 본 연구의 결과, 언어자극과 비언어자극 모두에서 시각적 MMN이 검출되었다. 하지만, 언어자극의 시각적 MMN이 비언어자극의 시각적 MMN보다 높게 나타남을 확인하였다. 이는 한국어 모국어화자들이 무의식적인 인지과정에서 언어자극이 갖는 물리적인 시각 정보뿐만 아니라 한국어 문자의 언어적 정보도 함께 처리하고 있음을 보여주는 것이다. 본 연구의 결과들은 한국어 글말의 무의식적인 인지처리과정을 밝혀주는 한편, 한국어 문자가 인지과학에서 갖는 중요한 지위를 보여줄 수 있을 것으로 기대된다.

• Annual Conference on Human and Language Technology
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• 2016.10a
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• pp.226-230
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• 2016

본 연구는 초등 저학년 읽기부진아동을 위한 한글 파닉스 교육의 기반을 확립하고자 1-2학년 교과서 고빈도 어절 531개를 기반으로 자소 및 음운규칙을 분석하였다. 연구결과, 자소-음소 일치 어절을 기반으로 하였을 때 초성에서 50번 이상 나타난 자소는 /ㄱ/, /ㄹ/, /ㄴ/, /ㅅ/, /ㅎ/, /ㅈ/이다. 중성에서 50번 이상 나타난 자소는 /ㅏ/, /ㅣ/, /ㅗ/, /ㅡ/, /ㅜ/이다. 종성에서 50번 이상 나타난 자소는 /ㄹ/, /ㄴ/, /ㅇ/이다. 자소와 음소가 불일치 된 어절을 기반으로 하였을 때 가장 많이 출현하는 음운규칙은 연음화 규칙이었다. 본 연구결과를 바탕으로 교과서를 기반으로 한 한글 파닉스 교육에 유용하게 사용될 수 있을 것이다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.11 no.2
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• pp.93-100
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• 1986

We analyzed Korean CV mono-syllables consisted of concatenation of consonants/k, t, p, g/, their fortis and rough sound and vowels/a, e, o, u, I/by the PARCOR technique, and then we synthesized those speech by means of the phoneme synthesis controlling the analyzed data. In the speech analysis, the duration of consonants decreases in the rough sound, the lenis and the fortis in turns. And also the gain of them decreases in the same tendency. The pitch period increases more and more in vowels following the rough sound, the fortis and the lenis in turns. We synthesized the lenis and the fortis by controlling the duration and the gain of the rough sound, and vowels following the fortis and the rough sound by controlling the pitch period and the duration of vowels following the lenis. As the results, the synthesized speech quality is good and we make certain it is possible to make a rule to the phonome synthesis in Korea speech.

• Journal of the Korea Computer Industry Society
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• v.9 no.1
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• pp.21-28
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• 2008

In this paper, the edge parameters were drawn from speaking image around lip and effective automatic lip reading system to recognize the Korean 'a/e/i/o/u' 5 owels were constructed using the parameter. Speaking images around lip were divided into $5{\times}5$ pane. In each pane the number of digital edge element using Sobel operator were evaluated. The observational error between samples was corrected by using normalization method and the normalized value is used for parameter In the experiment to convince the strength of parameter, 50 normal persons were sampled. The images of 10 persons were analyzed and the images of another 40 persons were experimented for recognition. 500 data are gathered and analyzed. Based on this analysis, the neural net system is constructed and the recognition experiments are performed for 400 data. The neural net system gave the best recognition result of 91.1%.

• Journal of Physiology & Pathology in Korean Medicine
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• v.18 no.1
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• pp.28-38
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• 2004

The Hun-Min-Jeong-Eum(訓民正音) has been created under the political purpose that is to unite politics and cultures through a philosophical harmony of the confucianism as well as the Buddhism under the periodical circumstance that includes the change of a dynasty and a revolution in culture. The creating work has been greatly affected by the theoretical divination, that is the confucian ideas of North-Song dynasty which has been highly elaborated in those days. The shape of the characters of the Hun-Min-Jeong-Eum(訓民正音) has been influenced by the ancient letters existing at the time (especially Ga-Rim-To 加臨多), it has been throughly readjusted and recreated based on the philosophy. The consonant uses the Three-Pillars(三才)(ㅇ, ㅁ, △) in the style of the five elements and each velar-lingual-labial-dental-guttural sounds (牙舌脣齒喉音) is applicable to five elements also a 'ㅇ' is equivalent to the heaven, a 'ㅁ' to the earth. a '△' to the man. The vowel uses the five elements of ㅗ(water). ㅏ(wood), ㅜ(fire), ㅓ(metal), ㆍ(five-soil), ─(ten-soil) in the style of the Three-Pillars(三才) of ㆍ, ㅡ, ㅣ and the first created letters(初出字), and the secondary created letters(再出字) each can be attached to the eight trigrams(八卦). The consonant has 17 letters and the vowel has 11 letters, therefore the total number of the letters is 28. and those are equivalent to the 28 constellation(二十八宿) of the astronomy. Contrary to the underlying principle that has been applied during the time of the creation of the letters, when the consonant and the vowel are used, the consonant refers to the heaven (天), and the vowel refers to the earth(地). a consonant take a part in making a point on the starting place of the pronounce, a vowel take a part in the keeping the energy to the end.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.35 no.4
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• pp.221-228
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• 2009

The purpose of the study was to investigate the characteristics of the pronunciation of Korean vowels in patients with class III malocclusion. 11 adult male patients with class III malocclusion(mean ages 22.3 years) and four adult males with normal occlusion(mean ages 26.5 years) were selected for the analysis of eight Korean monophthongs /ㅣ, ㅔ, ㅐ, ㅏ, ㅓ, ㅗ, ㅡ, ㅜ/. The values and relationships of F1, F2 and F3 were derived from the stable section of target vowel in each sentence, and the analysis using formant plots and vowel triangles' distance and area was conducted to find the features of two groups' vowel distributions. Consequently, it was identified that the pronunciation of males patients with class III malocclusion showed high values of F1 in the low vowels, high values of F2 in the back vowels, and remarkably low position of /ㅏ/. The vowel triangle suggested that the triangle areas of male patients with class III malocclusion were shown wider vertically and narrower horizontally than those of males with normal occlusion. These characteristics could reflect the structural features of class III malocclusion such as the prognathic mandible, low tongue position, and advancement of back position of the tongue.

• Phonetics and Speech Sciences
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• v.15 no.2
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• pp.21-29
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• 2023

This study investigates the transitional aspect of vowel harmony in Korean verbal conjugation. By observing the patterns of harmonic and disharmonic tokens of 42 verbal stems searched for in the National Institute of Korean Language (NIKL) Korean Dialogue Corpus 2020/2021, I found that disharmonic tokens appeared less than 0.1% of time, most of which consisted of an /a/-stem with a monosyllabic sentence-final suffix. It was noted that disharmonic pattern started to spread to other suffixes and possibly to /o/-stems. A simple perception test showed that the disharmonic forms might have originated from vowel reduction or undershoot. These results suggest that the ongoing change is accounted for from both the articulatory and perceptual perspectives.

• Journal of the korean academy of Pediatric Dentistry
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• v.24 no.1
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• pp.95-111
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• 1997

The human speech organ consists of respiration system (lung, larynx), phonation system (vocal cord), articulation system (esophagus, pharynx, uvula, teeth, gingiva, palate, tongue, lip) and resonating system(oral cavity, nasal cavity, paranasal sinus). Because teeth are components of the articulation system, it has been reported that the persons with abnormally positioned teeth generally have abnormal occlusion and pronunciation. In this study, using /ㅅ(s)/, the most commonly mispronunced consonant in children with malocclusion, and the seven single vowels, /사(sa), 서($s\delta$), 소(so), 수(su), 스($s\omega$), 시(si), 세(se)/ and / ㅏ(a), ㅓ($\delta$), ㅗ(o), ㅜ(u), ㅡ($\omega$), 1(i), ㅔ(e)/ were recorded and analyzed using speech analysis program on computer by measuring formants and compared them for investigating the differences in pronunciation in children with Angle's class I occlusions and those with Angle's class II div.1 malocclusion. The result were as follows: 1. In the Angle's Class II div.1 group, there were no significant differences in F1 of all recorded sounds as compared with Angle's Class I group(p>0.05). 2. In the consonants, there were significant differences in F2 of /스($s\omega$)/ and F2/F1 ratio of /사(sa), 서($s\delta$), 시(si)/ between the two group(p<0.05). 3. In the vowels, there were significant differences F2/F1 ratio of /ㅓ($\delta$)/(p<0.05) and no significant differences in F2/F1 ratio between two group(p>0.05). 4. In the consonants, there were significant differences in F2 and F2/F1 ratio when succeeding vowels were high or low, and F2/F1 ratio when front in accordance with tongue position (p<0.05). 5. In the vowels, there were no significant differences in formant in accordance with tongue position(p>0.05)