• International Journal of Advanced Culture Technology
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• 제8권3호
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• pp.316-324
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• 2020

It has experienced how difficult People with foreign language learning, it is to pronounce a new language different from the native language. The goal of various foreigners who want to learn Korean is to speak Korean as well as their native language to communicate smoothly. However, each native language's vocal habits also appear in Korean pronunciation, which prevents accurate information transmission. In this paper, the pronunciation of Chinese learners was compared with that of Korean. For comparison, the fundamental frequency and its variation of the speech signal were examined and the spectrogram was analyzed. The Formant frequencies known as the resonant frequency of the vocal tract were calculated. Based on these characteristics parameters, the classifier of the Supporting Vector Machine was found to classify the pronunciation of Koreans and the pronunciation of Chinese learners. In particular, the linguistic proposition was scientifically proved by examining the Korean pronunciation of /ㄹ/ that the Chinese people were not good at pronouncing.

• 센서학회지
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• 제14권6호
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• pp.415-422
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• 2005

Using stretch sensors, a stuttering treatment training device that improve the abnormal breathing of stutterer was designed and developed. To improve stutterer's inadequate breathing method that is one of principal reason of stammering, the device estimates breathing method by checking the changes of the stretch sensor's resistances those are put on the chest and abdomen of user. And a vocal exercise program that carry out exercises only when the user maintains the abdominal breathing was designed. Using a PIC16C711 device that includes an A/D convertor, a main controller was designed and the vocal exercises software was developed using Director and C program with graphic user interface for user convenience. The controller sends the resistance data of sensors to PC through the serial port and the software verifies the breathing method. And the device was designed that the RTS (request to send) pin of serial port in PC is used as a power source so that it can work without any battery or other power source. Three stutterers have carried out the clinical experiments using the implemented device for two months and the results showed it was excellent to alleviate the stuttering.

• 대한음성언어의학회:학술대회논문집
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• 대한음성언어의학회 1994년도 제2회 학술대회 연제순서 및 초록집
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• pp.84-84
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• 1994

사람의 음성은 성대에서 성대음이 발성되어 성도(vocal tract)에서 공명되고 여과(filter)되어 생성된다. 성도로는 후두로부터 하인두강, 중인두강, 구강으로 이어지는 주된 통로와 하인두강, 중인두강, 상인두강, 비강으로 이어지는 보조적인 통로가 있다. 보통의 모음 발성 시에는 구강으로 통하는 통로가 주로 공명강으로 작용되며 비강 통로는 별 작용을 하지 않지만, 'ㄴ, ㅁ, o, ' 등의 비 자음을 발성할 때에는 비강통로가 주 공명강으로 작용된다. (중략)

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2016년도 춘계 종합학술대회 논문집
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• pp.163-164
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• 2016

실용음악 산업 분야는 비약적인 기술력의 발전이 있었지만 그런 기술력이 실용음악 교육에 적극적으로 적용되지 않고 있다. 본 논문에서는 음악 산업현장에서 음원 콘텐츠 제작 시 보컬리스트의 음정 보정을 위해 개발된 오토 튠(auto tune) 기술을 활용하여 가창 연주 시 음정과 박자에 관한 실시간 피드백을 시각적으로 학습자에게 제공하는 방식의 학습법을 개발했다.

• 한국정보전자통신기술학회논문지
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• 제6권4호
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• pp.201-207
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• 2013

음성인식에 관한 연구는 꾸준히 발전되어 다양한 분야에서 제품에 적용되고 있으며, 특히 스마트폰과 차량의 내비게이션 시스템과 같은 정보기기에서의 적용은 매우 활발히 이루어지고 있는 것이 현실임에도 불구하고 음성인식 연구에서 한국어의 음운 특성을 고려한 연구는 미흡한 것도 현실이다. 디지털 콘텐츠에서 일반적으로 립 싱크의 제작은 애니메이터의 수작업을 반드시 필요로 하며, 이는 시간의 투입을 요하는 지루한 작업이다. 립 싱크를 자동 생성하는 응용 소프트웨어를 사용하기도 하나 반드시 수작업으로 수정과 보정 단계가 요구될 뿐만 아니라 영어 기반으로 제작된 립 싱크 자동생성 소프트웨어를 적용하므로 한국어 음운체계가 달라 자연스러운 립 싱크를 얻기 위하여 많은 시간과 노력이 요구된다. 따라서 본 연구에서는 한국어 음운체계를 고려한 가상 오브젝트들의 립 싱크를 자동 생성하기 위한 화자 독립 기반 한국어 단모음 실시간 인식 알고리즘을 개발을 목표로 하며, 그 인식 결과는 립 싱크의 애니메이션 키로 활용하고자 한다.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1982년도 제16차 학술대회연제순서 및 초록
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• pp.11.2-12
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• 1982

최근 우리나라에 있어서도 후두미세수술의 발달로 음성외과 분야에 대한 관심이 높아졌으며 음성장애 환자의 진단 및 치료면에서도 괄목할 만한 발전을 가져왔다. 우리는 작금의 음성외래에서 진단되는 음성장애 환자중에서 특히 성대의 유리연(遊離緣)을 따라서 평행하는 선상(線狀)의 성대구 (聲帶溝)를 보게되는데 이와같이 성문의 폐쇄부전을 동반하는 성대구증 (Sulcus Vocalis)은 1901 년 Salvi에 의해서 처음으로 명명보고된 이래로 유럽과 일본등에서 다수 보고된 바있으나. 우리나라에서는 비교적 관심이 적었던 질환으로 그 뚜렷한 원인과 치료에 대해서는 아직도 정설이 없는 상태이다. 이에 본 교실에서는 1981년 5월부터 1982년 3월까지 본원 음성언어연구실로 내원한 성대구증환자 35예에 대하여 일련의 음성검사를 시행하여 약간의 치험을 고찰한 바 있기에 그 결과를 보고하는 바이다. 1 ) 발생 빈도는 음성 장애를 주소로 내원한 290 예의 환자 중 35예로써 약 12 %였다. 2) 발병연령은 10세 이하에서 19예 (54%)로 가장 많았으며 다음은 10대, 20대의 순이였다. 3 ) 발병연령은 대부분의 예에서 불명이었으나 4예에서는 홍역 후에, 3예에서는 심한 감기 후에 병발했으며, 2 예는 선천적인 것으로 사려되었다. 4) 예중 25예 (71 %)에서 양측성이었고, 좌,우 편측성인 경우가 각각 8예 (23 %), 및 2예 (6 %)였다. 5 ) 임상증상은 거의가 애성을 주소로 하고 있었으며 7 예에서는 만성후두염을 동반하고 있었다. 6 ) 공기역학적검사에서는 20 예(57 %)에 서 최대발성지속시간 (Maximal Phonation time)이 감소되어 있었고, 발성율(發聲率, Phonation Quotient)은 22예(63 %)에서 증가되었으며, 발성시평균호기유율(Mean Air Flow Rate)은 23예 (66 %)에서 증가되었다. 7 ) 스트로보스코피(Stroboscopy) 를 시행할 수 있었던 33예 중 31예 (93%)에서 성문폐쇄부전 (glottic chink)이 있었으며 양측성대의 진동성은 거의 전례에서 규칙적 (regular)이었고, 4예(12 %)에서 비대칭(asymmetric)이었으며, 진폭 (amplitude) 은 5 예 (21 %)에서 감소되었으며, 점막파동(mucosal wave) 은 24 예 (73 %)에서 감소되었다. 8) 치료로서 상기 환자중 5예에서 성대내 테프론(Teflon) 주입을 실시하였고 1예에서 성대구절제술(Sulcusectomy)를 실시하였는데 테프론을 주입한 1예에서 증상의 호전이 있었을 뿐 다른 예에서는 효과가 뚜렷치 않아서 앞으로의 원격성적이 요망되었다.

• 대한후두음성언어의학회지
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• 제18권1호
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• pp.26-32
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• 2007

Objective and Background: Laryngeal stroboscope is an useful equipment in evaluation of vocal cord vibration and in early detection of mucosal lesion including invasive cancer of the vocal cord. Recently Lee et al. (2006) developed portable stroboscope using voice as synchronization signal. It has been frequently impaired ability to synchronize the flashes even in normal female. Authors tried to investigate various methods including vibration pick-up, microphone, laryngeal microphone, and contact microphone for development of simple and accurate method like electroglottograph signal. The purpose of this study was to estimate wheher the vibration pick-up is available and is consistent with the signal of EGG. Subjects and Methods: Authors compared the signals between EGG and noncontact method such as voice, contact methods including vibration pick-up, laryngeal microphone, and contact microphone in normal twenty adults (male 10 and female 10). The number of peak in one cycle was compared with the number of the peak in EGG, and the percent of phase difference in the peak was compared with EGG Also, authors tried to investigate which site of vibration pick-up was most effective for synchronization of stobo flashes. Three site including anterior neck below the cricoid cartilage, thyroid ala, and suprahyoid region were analysed. Results: Among various methods for synchronization of strobo flashes, vibration pick-up was most effective method in peak detection. And anterior neck below cricoid cartilage was the most available site of the vibration pick-up. Conclusion: Authors suggest that vibration pick-up is most available and effective method for synchronization of strobo flashes.

• 대한통합의학회지
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• 제8권4호
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• pp.291-305
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• 2020

Purpose : The duration of speech segments reflects children's speech motor development. The purpose of this study was to determine whether segmental sound and word duration varies by age among preschool children. Methods : A total of 60 children aged 4~5 years participated in this study. Participants took the picture-naming test to produce single-word speech data. The duration of the consonant at the initial position of the word and the final position of the word, the voice onset time of plosive, the duration of the vowel following the initial consonant, and the duration of the word were measured. Results : As age increased, the duration of the initial consonant, the duration of the word, and the voice onset time decreased significantly. The main effects of age, manner of articulation, and place of articulation on the duration of the initial consonant were significant. The duration of consonants in the nasal sound and plosives and the duration of bilabial and alveolar sound differed significantly between groups. The main effects of age and vocal type on voice onset time were significant. The main effect of age on the duration of the consonant in the final position of word and on the duration of the vowel were not statistically significant. Conclusion : The results of this study showed that the duration of segmental sound and the word were associated with speech development between 4 and 5 years old. Accordingly, duration of the segmental sound and the word may serve as an acoustic cue as they reflect speech development and speech motor control maturity.

• Animal cells and systems
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• 제9권2호
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• pp.47-55
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• 2005

Avian vocalization has been main topics in studying animal communication. The structure and usage as well as development and function of vocalization vary enormously among species and even among populations, and thus we reviewed the general patterns of song learning and the consequences of song communication in birds at the behavioural level: first, we compared the different learning phenomena between non-songbird and songbird, and we investigated the learning process of songbird both in the field and in the lab, which are needed to fully understand vocal communication. Second, we discussed a recent trend of sexual selection hypothesis explaining the structural and functional diversity of song in songbirds with repertoire and presented how the repertoire is actually used between neighbours based on individual recognition.

• 대한후두음성언어의학회지
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• 제21권2호
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• pp.101-104
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• 2010

The origin and growth of laryngology is inseparably linked to the development of endoscopic surgery of the larynx. Phonomicrosurgery is a means of maximally preserving the layered microstructure of the vocal fold, that is, the epithelium and lamina propria. Phonomicrosurgery has developed from convergence of micro laryngoscopic surgical technique theory and the mucosal wave theory of laryngeal sound production. Improvements in technology (i.e., laryngoscopes, handled instruments, and lasers), which in part arise from developments in more frequently performed minimally invasive surgical procedures, will probably facilitate the next generation of procedural innovations. The best methods of optimizing phonosurgical outcomes include making an accurate diagnosis, completing a comprehensive voice evaluation, providing sufficient preoperative therapy, carefully selecting patients to undergo phonomicrosurgical procedures, and requiring sufficient postoperative rest and therapy. Phonomicrosurgery will continue to evolve as a result of the interdependent collaboration of surgeons with voice scientists, speech pathologist, and other voice professionals.