사골동에서 발생한 Endodermal sinus Tumor 1례

진성민,이상학,유홍균 대한이비인후과학회 1990 대한이비인후과학회지 두경부외과학 Vol.33 No.6

셀룰로오스 표면간 부착력 평가를 통한 펄프섬유에의 고분자다층박막 형성이 종이 물성에 미치는 영향 구명

진성민,윤혜정,심규정 한국펄프·종이공학회 2009 한국펄프·종이공학회 학술발표논문집 Vol.2009 No.10

성대결절이 있는 성악도에서의 음성분석학적 특징

진성민,김대영,김남훈,권기환,이경철,이용배 대한후두음성언어의학회 1999 대한후두음성언어의학회지 Vol.10 No.2

Objectives : The purpose of this study was to systematically analyze and compare the acoustic characteristics of vocal major students with vocal nodule when singing. Materials and Methods : Ten sopranos with vocal nodule, who have never been treated due to voice problems, were the subject group. Twenty healthy sopranos major students were the control group for this study. The vocal nodule was confirmed by stroboscopy and the acoustic and electroglottographic analysis was conducted on be groups. Additionally, an inquiry on usual voice problems during speaking and singing were performed on each of the groups. Results : The vowel /a/ was spoken and sung by sopranos of each group. There were no significant differences in Fo, jitter, shimmer, NHR at speaking and singing in either group. We did not register any significant differences of closed quotient and speed quotient in electroglottography for both groups at singing, but speed quotient was increased in subject group at speaking(p<0.05). And the sopranos with nodule demonstrated voice fatigue(70%), strained and tired voice after long period of performance and conversation(60%) on inquiry. Conclusions : Although they had a vocal nodule, this group, who had a long period of voice training, did not present any differences in acoustic and electroglottographic problems during short performance, but, the vocalists noticed delicate voice problems after a long performance. We conclude that the voice training teacher and laryngologist must initiate voice management and speech therapy for vocal nodule, even if there is no specific abnormality in acoustic analysis.

연령증가에 따른 정상 노인의 음향분석학적 특징

진성민,권기환,강현국 대한후두음성언어의학회 1997 대한후두음성언어의학회지 Vol.8 No.1

Anatomic and physiological changes of the larynx with advancing age result in morphologic changes of the vocal fold and reduced control of the phonatory mechanism in elderly individuals and are reflected in increased unstability of fundamental frequency (Fo). The purpose of this study is to increase current understanding of acoustic and stroboscopic characteristics of normal elderly persons voices. First, phonated /a/ vowel productions by 40 normal adults (20 to 40 years, 20 men and 20 women) and 40 normal elderly persons (60 to 80 years,20 men and 20 women) were analyzed, using CSL (model 4300B) acoustic analysis software, to obtain acoustic measures related to fundamental frequency stability nd vocal resonance characteristics. Second, stroboscopic images of the vocal fold behavior in all subjects were analyzed by experienced specialists. In the men, fundamental frequency variation (vFe) (p<0.01), jitter. (p<0.05), and shimmer (p<0.05) for the older group were significantly higher than the value for the adult group. In the stroboscopic findings, edema of vocal fold had a significant finding in aged men (15%). In the women, vFo (p<0.05), jitter (p<0.05), and noise to harmonic ratio (NHR) (p<0.05) for the older group were significantly higher than the value for e adult group and first formant frequency (F1) (p<0.01) and second formant frequency (F2) (p<0.01) for. the older group were significantly lower than the value for the adult group. In the stroboscopic findings, vocal fold atrophy had a significant finding in aged women (25%). Frequency stability, as reflected by vFo, jitter, shimmer, and NHR, decreases with advancing age in men and women and spectral analysis of phonated /a/ vowel productions reveals the lowering of the frequency of F1 and second F2 with advancing age, especially in aged women. Change in the mass of vocal folds, due to atrophy or edema, is considered to be the greatest factor in these acoustic changes.

교환수들의 음성발성에 대한 평가

진성민 대한후두음성언어의학회 1997 대한후두음성언어의학회지 Vol.8 No.1

Backgroud : Now a days, most studies for professional voice user have been performed after artificial voice abuse without consideration of environmental and personal factors, and occupational specificity, therefore those studies have some problems. Objectives : To make a basic guideline for the management of untrained professional voice user, practically we ananalyzed the voice of experimental group. Materials and methods : Just after working, the sustained vowel sounds of the 15 female telephone operators (subjective group) and the 20 normal female persons (control group) were analysed, using a history paper, acoustic analyzer and videostroboscopy. Results : The most common symptom in subjective group was dysphonia. Stroboscopic findings in subjective group were as following ; posterior chink 11 cases (73%), incomplete closure 2 cases (13%), anterior chink 1 case (7%). The mean maximal phonation time in telephone operators was 12.8 seconds and in control group was 16.8 seconds. Jitter, pitch pertubation quotient (PPQ), shimmer and amplitude pertubation quotient (ASQ) were significantly increased in subjective group than control group, but there is no difference between two group in fundamental frequency and noise to harmonic ratio. Conclusion : Untrained professional voice user needs professional career guidance and counseling. And when we manage the untrained professional voice user, we should consider specific occupational, personal and environmental factors as well as laryngeal factors.

성악도들의 음성관리 및 성대화상술상의 문제점과 발성에 대한 음향분석학적 특징

진성민,김대영,반재호,이상혁,송윤경,권기환,이경철,이용배 대한후두음성언어의학회 1999 대한후두음성언어의학회지 Vol.10 No.1

Objectives : The purpose of this study was to systematically analyze and compare e acoustic sound structure of vocal major student's singing voice. Materials and Methods : The nineteen vocal major students were the subject group and healthy nineteen females were the control group for this study. The subject group was taken a strobovideolaryngoscopy by the use of flexible nasopharyngoscopy. And acoustic analysis was taken between two groups. Additionally the inquiry on usual voice problems and management was performed by thirty-six vocal major students. Results : The subject group presents many functional voice disorder findings such as AP contraction(44%), phase difference(36%) tremor(25%), posterior gap(17%), hyperadduction of vestibular fold(6%), and anterior gap(3%) on strobovideolaryngoscopy. And the vocal major students did reveal an enhanced number of high frequency harmonic partials when singing compared to the control group in the narrow band spectrum study. But there was no significant difference in jitter, shimmer and noise to harmonic ratio in both groups. Almost all vocal major students present a lot of voice problems in singing such as loss of high note(17%), loss of quiet voice(17%), effortful and tired voice(36%) etc on inquiry. And they always effort to prevent vocal dysfunction by the use of various type of method such as voice rest(28%), hydration(28%), gargling with salt(11%) etc. Conclusions : The vocal major students always take care of maintaining a good voice condition, but a lot of vocal major students revealed abnormal strobovideolaryngoscopic findings and they are absent in the conception of systemic and scientific voice management. Therefore, the young singers need a good voice training and voice therapy Program under the good ralationship of laryngologist and voice training teacher.

위식도 역류 및 인후두 역류의 진단

진성민,Jin, Sung-Min 대한기관식도과학회 2002 大韓氣管食道科學會誌 Vol.8 No.2

어프로치 시스템 체스트 용량 변동에 대한 동적 시뮬레이션 적용

진성민,윤혜정,함충현,유성호 한국펄프.종이工學會 2005 펄프.종이기술 Vol.37 No.2

캘린더 처리가 펄프별 종이의 압축 및 표면 특성에 미치는 영향

진성민,윤혜정,이학래,이상길 한국펄프.종이工學會 2004 펄프.종이기술 Vol.36 No.3

중증 근무력증 1례

진성민,이성채,송윤경,이한보 대한후두음성언어의학회 1998 대한후두음성언어의학회지 Vol.9 No.2

Myasthenia gravis is a neuromuscular disorder that affects striated muscles especially those innervated by the cranial nerves. Most patients present with symptoms relating to the head and neck and thus may be seen first by the otolaryngologist. Recently we had experienced a case of myasthenia gravis with the complaints of hypernasality and voice fatigue in a 49 year old male. In this case, all symptoms were improved markedly with administration of anticholinesterase.