구개열 환자 말 평가 시 검사어에 대한 고찰 : 임상현장의 말 평가 어음자료와 문헌적 고찰을 중심으로

최성희,최재남,남도현,최홍식,Choi, Seong-Hee,Choi, Jae-Nam,Nam, Do-Hyun,Choi, Hong-Shik 대한후두음성언어의학회 2005 대한후두음성언어의학회지 Vol.16 No.1

Differential diagnosis of articulation and resonance problems in the cleft lip and palate speech is required for evaluating various factors contribute to speech problems such as VPI, dental occlusion, palatal fistulae, learning. However, validity of speech stimuli is current issue to evaluate accurately each problem in cleft speech. This study was conducted to investigate speech stimuli using in the clinical setting and review the literatures and articles published 1990 to 2005 for helping develop standardized speech samples. The results were recommendation to evaluate properly velopharyngeal function when conducting a diagnostic evaluation as follows : 1) In identification hypernasality, the speech stimuli should be included low pressure consonants to eliminate effects of nasal emission, compensatory articulation. 2) Speech stimuli should be consist of visual, front sounds to eliminate compensatory articulation and to stimulate easily. 3) Regarding early diagnosis and treatment, speech stimuli need to develop for infants and preschooler. 4) Stimulus length on nasalance scores should be at least 6 syllables. 5) In phonetic context on nasalance scores, /i/ vowel should be take into consideration excluding paragraph. 6) Connected speech stimuli should be developed for evaluating intelligibility and VP function.

파킨슨증의 음성진전 : 감별진단을 위한 예비연구

최성희,김향희,이원용,최홍식,Choi, Seong-Hee,Kim, Hyang-Hee,Lee, Won-Yong,Choi, Hong-Shik 한국음성학회 2005 음성과학 Vol.12 No.3

Tremor is a main factor of parkinsonism. Voice tremor may be the first, later or the only symptom of a neurological disease and its frequency, amplitude, and regularity may differ among the diseases of different neural subsystems. Differential diagnosis between idiopathic Parkinson's disease (IPD) and multiple system atrophy (MSA) has been difficult. This study included three groups: (1) 6 IPD patients; (2) 6 MSA patients; and (3) 20 ageand sex-matched normal controls. The MDVP (Multidimensional Voice Program) was used to analyze the sustained /a/phonation. The results were as follows: (1) frequency perturbation parameters (jitter, sPPQ, Vf0) and FTRI of tremor parameter of two patient groups were statistically different from those of the controls (p < .01); (2) measures were higher in short-term and long-term f0 and amplitude perturbation in MSA than IPD; (3) however, any acoustic parameters between IPD and MSA were not statistically different; except for the rate of frequency tremor, 4$\sim$5 Hz in IPD, 5$\sim$11 Hz in MSA and (4) the pattern of regularity for voice tremor through histogram indicated that amplitude of IPD was irregular while both f0 and amplitude of MSA were irregular. In conclusion, F0, rate of frequency tremor, and pattern of f0 regularity may be predictors for differential diagnosis. These findings might signify that voice tremor of parkinsonism was resulted from modulation of f0.

전기성문파형검사를 이용한 모음과 공명 자음의 발성특성

최성희,남도현,임재열,임성은,최홍식,Choi, Seong-Hee,Nam, Do-Hyun,Lim, Jae-Yol,Lim, Sung-Eun,Choi, Hong-Shik 대한후두음성언어의학회 2004 대한후두음성언어의학회지 Vol.15 No.2

Background and Objectives : Vowels and resonant including nasals and liquid are produced with vocal folds vibration have been used for voice therapy of hyperadduction patients. This study was conducted to investigate phonatory characteristics of vowels and resonant consonants through the EGG measures from Lx. Speech studio (Laryngograph Ltd, UK). Materials and Method : 7 male adults produced sustained vowel /a/, /i/, /u/, nasals /m/, /n/, /${\eta}$/and liquid /I/ and read the sentences (1nasals-liquid sentence, 1 non-nasals-liquid sentence) and tongue-tip trill and humming. Fx(Hz), Ox(%) were obtained of vowels, nasals, liquid and each of the posterior vowel /a/ of /ma/, /na/, /la/, /ha/ with same F0(around F#165Hz) and amplitude (75${\pm}$5db). And also DFx(Hz), DQx(%), CFx(%) and CAx(%) were obtained from reading two kinds of sentences. Results : Qx(%) was the highest in /u/ of vowels, and nasal/n/ of the resonant consonants and nasals-liquid sentence was higher Qx than non-nasals-liquid sentence but significant differences were not found. Qx(%) of the posterior vowel /a/ of nasal consonants/n/ was higher than in the isolated vowel/a/ and other posterior vowel of resonant consonants and fricatives /h/. Regularity or periodicity and higher Qx were observed in the nasals-liquid sentence than non-nasals-liquid sentence in graphs of QxFx & CFx produced by Quantiative analysis. In the nasalance score, /u/vowel was significant higher among the vowels and /I/ liquid was significant lower among the resonant consonants and nasals-liquid sentence is higher than non-nasals -liquid sentence. CQ(%) was not significantly correlated with nasalance(%). Conclusion : These findings might signify resonant phonation was not correlated with nasalance.

성악가와 훈련 받지 않은 일반인의 음도, 강도, 성구 변화 시 발성 및 호흡조절 특성

최성희,남도현,김덕원,김영호,최홍식,Choi, Seong-Hee,Nam, Do-Hyun,Kim, Deak-Won,Kim, Young-Ho,Choi, Hong-Shik 대한후두음성언어의학회 2006 대한후두음성언어의학회지 Vol.17 No.2

Background and Objectives : Training of breath support and laryngeal muscles control are important components in the development of the singing voice. The purpose of this study is to compare characteristics of respiratory and phonatory control on pitch, loudness, register change with untrained males and trained male singers. Materials and Methods : The 11 untrained males and 11 trained male singers participated. Closed Quotient(CQ), fundamental frequency (fo) and relative volume contribution of the rib cage (in percentage rib cage, % RC) and relative volume contribution of abdomen (in percentage abdomen, % AB) were measured during various pitch, loudness, register tasks using /a/ vowel phonation : Legato, staccato with C3-D3-E3-F3-G3 notes and crescendo and decrescendo with C3 note as well as modal register with C3 and falsetto register with C4 note using an integrated analysis system of Respiration, EGG and Voice. Results : (1) When pitch increased with legato task, loudness also increased in untrained male group but maintained in trained male singers. CQ was also increased both untrained and trained male singers but it was not significantly different ($p>.05$). The abdomen contribution to lung volume were significantly predominant both in inhalation and exhalation in trained males singers ($p<.05$). (2) When pitch increased with staccato task, CQ was not significantly different in untrained but significantly different in trained male singers. The respiratory function of male singers were characterized by significantly predominant abdomen contribution to lung volume in exhalation except for inhalation ($p<.05$) (3) When loudness increased with crescendo, fo was significantly increased with increasing CQ in untrained males but fo was relatively consistent with increasing CQ in trained male singers. The respiratory function of male singers were characterized by significantly predominant abdomen contribution to lung volume in exhalation except for inhalation ($p<.05$). (4) Most male singers were able to change register from modal to falsetto register, but untrained males were not. Thus, CQ was significantly different between modal and falsetto register in trained male singers ($p<.05$). The respiratory function of male singers were characterized by significantly predominant abdomen contribution to lung volume in exhalation except for inhalation ($p<.05$). Conclusion : Male singers were superior to untrained males in coordination of respiratory and phonatory control on pitch, loudness, register change. Implication are offered regarding how the results might be applied to the voice therapy as well as singing training.

각종 음성분석기에 따른 음성장애 환자의 주기간 주파수 및 진폭변동률 분석

최성희,남도현,이승훈,정원혁,김덕원,최홍식,Choi Seong Hee,Nam Do-Hyun,Lee Seung-Hoon,Jung Won-Hyuk,Kim Deok-Won,Choi Hong-Shik 대한후두음성언어의학회 2005 대한후두음성언어의학회지 Vol.16 No.2

Background and Objectives : Voice perturbation measures, such as jitter and shimmer has been importantly used for diagnosis and treatment efficacy of laryngeal dysfunction. This study was conducted to investigate validity of newly developed multi-channel voice analyzer program by comparing with MDVP, PRAAT, TF32. In addition, we compared the voice perturbation measures with different voice analyzer program by type of signals. Materials and Methods : Nineteen mild-severe dysphonic patients participated in our study. Fundamental frequency, jitter and shimmer values were obtained from different voice analyzer program using the same sustained/ah/phonation. Results : Fundamental frequency and shimmer were highly correlated whereas jitter was weakly correlated between newly developed multi-channel voice analyzer program and the others though different pitch computation algorithm except MDVP, In addition, Type 2 and 3 signals were weakly correlated than Type 1. Conclusion : In the clinical setting, clinician may have sufficient information of voice analyzer and control conditions properly for severity of pathologic voice before voice perturbation measure to obtain reliable results.

경부형 전기인공후두 Blueton의 개발과 음향학적 성능 분석

최성희,박용재,박영관,김태정,남도현,임성은,이성은,김한수,최홍식,김광문,Choi, Seong-Hee,Park, Young-Jae,Park, Young-Kwan,Kim, Tae-Jung,Nam, Do-Hyun,Lim, Sung-Eun,Lee, Sung-Eun,Kim, Han-Soo,Choi, Hong-Shik,Kim, Kwang-Moon 대한후두음성언어의학회 2004 대한후두음성언어의학회지 Vol.15 No.1

Electrolarynx(EL), battery operated vibrators which are held against the neck by on-off button, has been widely used as a verbal communication method among post-laryngectomized patients. EL speech can produce easily without need of any additional surgery or special training and be used with any other methods. This institute developed a neck-typed EL named "Blueton" in commperation with EL Company Linkus, which consists of 3 parts : Vibrator part, Control part, Battery part. In this study we evaluated the acoustic characteristics of the produced voices by Blueton compared with Servox-inton using MDVP. Three EL users (2 full time users, 1 part time user) were participated. The results revelaed that NHR higher in Servox than Blueton and intensity is higher in Blueton than Servox. The spectra for vowels produced by EL speakers are mixed signals combined with talkers' vocal output and electrolarynx noise. The spectra pattern is similar with two ELs. High, SPI index and vowel spectra from MDVP demonstrated characteristics of both electrolarynxes related to noise signal. This finding suggests that Blueton helps to provide one of useful rehabilitation options in the post laryngectomy patients.

음질 분석에 있어서 모음에 따른 안정성과 변이성

최성희(Choi, Seong Hee),최철희(Choi, Chul-Hee) 한국음성학회 2015 말소리와 음성과학 Vol.7 No.1

This study explored the vowel effect on acoustic perturbation measures in voice quality analysis. For this study, the perturbation parameters (%jitter, %shimmer) and noise parameter (SNR) were measured with 7 Korean vowels (/a/, /?/, /i/, /o/, /u/, /?/, /?/) using CSpeech with 50 Korean normal young adults (24 males and 26 females). A significant vowel effect was found only in %shimmer and in particular, low-back /a/vowel was significantly different from other vowels in %shimmer. The least perturbation and noise were exhibited on high-back /?/ and /o/ vowel, respectively. Based on tongue height, a significant higher %shimmer was demonstrated on low vowels than high vowels. In addition, back vowels in tongue advancement and rounded vowels in lip rounding showed significantly less perturbation and noise. The least variability of perturbation and noise within individuals was demonstrated on the vowel /i/ in three repeated measures. However, there was no significant difference among 3 token measures in single session among vowels tested except the vowel /o/. Consequently, the vowel /a/ commonly used in acoustic perturbation measures exhibited higher perturbation and noise whereas higher stability and less variability were demonstrated on the high-back vowel /u/. These results suggested that the Korean high-back vowel /u/ can be more appropriate and reliable for perturbation acoustic measures.

중등 영어 교육에서 인터넷을 활용한 영어 과제 학습의 효과

최성희 ( Seong Hee Choi ),이연주 ( Yeon Joo Lee ) 한국멀티미디어언어교육학회 2003 Multimedia Assisted Language Learning Vol.6 No.2

기동표적 추적을 위한 Activation-Only VSIMM 알고리듬

崔性熙(Seong Hee Choi),宋澤烈(Taek Lyul Song) 대한전기학회 2002 전기학회논문지 D Vol.51 No.9

Allium 속 식물 Cysteine화합물이 당뇨 쥐의 지질대사에 미치는 영향

최성희 ( Seong Hee Choi ),박정로 ( Jeong Ro Park ) 한국식품영양학회 2010 韓國食品營養學會誌 Vol.23 No.3

In this study, cysteine compounds found ingenus Allium plants, including N-acetyl cysteine(NAC), S-allyl cysteine(SAC), S-ethyl cysteine(SEC), and S-methyl cysteine(SMC), were examined for effects on blood glucose, glucose tolerance, and plasma lipid concentrations in streptozotocin(STZ)-induced diabetic mice. In the mice, the ingestion of these cysteine compounds did not affect blood glucose levels significantly. However, their ingestion did improve the diabetic symptoms of polydipsia, polyphagia, polyuria, and weight loss. glucose tolerance was also found to be improved in the STZ diabetic animals by feeding the cysteine compounds. Treatment of the compounds also caused a slight decrease in plasma concentrations of total cholesterol along with increases in HDL-cholesterol and slight decreases in LDL-cholesterol, resulting in a significant decrease in the atherogenic index of plasma in the diabetic animals. They also showed reductions of liver triglyceride content to relieve diabetic fatty liver syndrome. In summary, the cysteine compounds such as NAC, SAC, SEC, and SMC, found ingenus Allium plants, had certain beneficial effects on blood glucose metabolism along with preventing abnormalities in lipid metabolism, a complication of diabetes, by improving the atherogenic index of plasma and fatty liver in STZ-induced diabetic mice.