• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
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• pp.216-218
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• 2005

This paper present a new approach to a noise robust recognizer for WPS interface. In noisy environments, performance of speech recognition is decreased rapidly. To solve this problem, We propose the recognition system using vocal-cord signal instead of speech. Vocal-cord signal has low quality but it is more robust to environment noise than speech signal. As a result, we obtained 75.21% accuracy using MFCC with CMS and 83.72% accuracy using ZCPA with RASTA.

• 대한음성언어의학회:학술대회논문집
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• 대한음성언어학회 2017년도 제46차 춘계학술대회
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• pp.98-98
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• 2017

• 대한후두음성언어의학회지
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• 제24권1호
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• pp.28-32
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• 2013

Because the human voice is produced through vibration of the vocal cords during the exhalation of airflow, it is important to observe the vibration pattern of the vocal cords in patients complaining of voice changes. However, it is not easy to observe the actual vibration pattern of the vocal cord because it vibrates so fast that it cannot be observed by the naked eye and it is located deep in the throat. Recently, with advances in instruments, including laryngoscopes and video camera systems, the vibration pattern of the vocal cords can now be observed. However, considering that present video camera systems can detect 30-60 images per second and the vocal cord vibrates at 100-200 and 200-300 times per second in men and women, respectively, it is not possible to record the whole mucosal wave of the vocal cord in real time. To overcome this limitation, a stroboscope, which converts fast movements of the vocal cord into slower images, has been developed. Since then, several instruments were developed to examine vocal vibration pattern. However, each instruments have advantages and disadvantages. Therefore, we should know about these things to apply them in patients with voice problem.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1993년도 제27차 학술대회 초록집
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• pp.75-75
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• 1993

1991년 3월부터 1993년 2월까지 2년간 가톨릭의대 부속 강남성모병원 이비인후과에서 양성 성대질환으로 후두미세수술을 받은 158명중 16명(10.1%)에서 성대구가 동반하고있음을 관찰하고 후향적으로 이를 임상분석하였다. 총 16명에서 남녀 성별의 차이는 없었으나, 나이는 40대(43.8%)가 가장 많았다. 성대폴립의 7.5% (7/93), 성대결절의 15.8%(6/38), 성대낭종의 8.3% (1/12), Reinke부종의 11.1% (1/9)에서 성대구가 동반되었다. 성대구는 일측성이 10명 (62.5%), 양측성이 6명 (31.5%)이였다. 성대구는 주로 성대의 막성부 중간부위에 위치하고, 길이는 성대 막성부 길이의 1/2미만이 16예 (72.7%), l/2이상이 6예(27.3%), 깊이는 12예 (54.5%)에서 성대인대에 맞닿는 정도로 깊었다. 성대구는 동반된 성대 질환보다 상부에 13예 (59.1%), 하부에 7예 (31.8%), 상하부 병변사이에 2예 (9.1%)로 각각 위치하고있었다. 양성 성대질환에 대한 후두미세수술시 병변 주위에 성대구가 동반되는 경우가 있어 주의 깊은 관찰과 치료를 요한다.

• 대한후두음성언어의학회지
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• 제15권1호
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• pp.43-47
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• 2004

When a person was suffered from vocal cord paralysis or glottic insufficiency, injection materials (e.g Teflon, Bovine collagen, Autologous fat & tendon, Gelfoam) into the vocal cord have been widely used. But each injection material has some disadvantage. We introduce the Restylane which is composed of a hyaluronic acid, artificially producted. It has advantage of rate foreign body reaction, proper endurance, easy to injection. The patient was 55-year-old woman who showed left vacal cord paralysis after pneumonectomy due to aspergillosis, taken the type I thyroplasty and arytenoid adduction. The middle portion of left vocal cord has some atropic mucosal change, slight chink was noted. The restylane injection into vocal cord was done with suspension laryngoscopy under general anesthesia. In the 3 month follow-up after Restylane injection, the quality of voice has been better progressively. We report a case of Restylane injection as a new method for the improvement of quality of voice.

• 한방안이비인후피부과학회지
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• 제19권2호
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• pp.281-287
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• 2006

Objective : This study was designed to evaluate the effects of oriental medicine therapy on Vocal cord paralysis with Ramsay Hunt syn. Methods & Result : The clinical data was analyzed on a patient with Vocal cord paralysis with Ramsay Hunt syn. whose main symptoms were right facial palsy, auricle pain, dysphagia and hoarseness. The patient was treated by the acupucture and Herb-medicine.. As the result, symptoms are improved. Conclusion : This result suggest that the acupucture and Herb-medicine. was effective treatment of Vocal cord paralysis. So futher research is needed continuously.

• 대한후두음성언어의학회지
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• 제6권1호
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• pp.27-38
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• 1995

It is well known that unilateral vocal cord paralysis is a sign of a disease and not a disease entity. In an attempt to evalute incidence of unilateral vocal cord paralysis related to varoius causes and to analyze our treatment results, the records of 210 patients seen at the Department of Otorhinolaryngology, Yongdong Severance Hospital during the 10-year period from March 1985 to March 1995 were reviewed. Fifty-three patients(25.2%) of the 210 patients with unilateral vocal cord paralysis had surgery-related causes, and intubations including tracheostomy was the most common etilogy among them. One hundred and fifty seven cases(74.8%) was not related to surgery and, among these most common cause was idiopathic. Spontaneous recovery took place in 17(8%) patients. Phonosurgery including type Ⅰ thyroplasty(n=16) and arytenoid adduction(n=10) and combination of them(n=3) yielded good results except intrafold teflon injection(n=4). These results of our series were compared to other series reported over the past decades.

• 대한후두음성언어의학회지
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• 제33권3호
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• pp.172-178
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• 2022

Background and Objectives Injection laryngoplasty is a common method for treatment of unilateral vocal fold paralysis. Unilateral vocal fold paralysis has various causes, including idiopathic, infection, stroke, neurologic condition, surgery and nerve invasion by cancer. To the knowledge of the authors, there was no study on the relationship between the causes of vocal cord paralysis and the outcome of injection laryngoplasty. Therefore, we tried to investigate the difference in the outcomes of injection laryngoplasty between vocal cord paralysis after surgery group and nerve invasion by cancer group. Materials and Method A retrospective analysis was performed for 24 patients who underwent vocal cord injection due to unilateral vocal cord paralysis caused by surgery or nerve invasion by cancer. The objective quality of the voice was assessed by acoustic voice analysis with the Multi-Dimensional Voice Program. Results Both group showed an improvement of fundamental frequemcy (F0), jitter percent, shimmer (percent), and noise to hearmonic ratio (NHR) after injection laryngoplasty. The vocal cord paralysis due to nerve invasion group showed more improvement in both the mean and median value of F0, shimmer percent and NHR than the vocal cord paralysis due to surgery group, but there was not statistically significant. Conclusion Our study did not show a statistically significant difference in outcome between vocal cord paralysis due to cancer invasion group and surgery group, but statistically tendency was suggested. The vocal cord paralysis due to nerve invasion group showed more improvement in both the mean and median value of acoustic voice analysis than surgery group.

• 대한후두음성언어의학회지
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• 제15권1호
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• pp.52-54
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• 2004

Hemangioma of the larynx is generally classified into adult and infantile form. More common infantile form usually arises on subglottic portiion and may cause respiratory distress. Adult form is rare and arises on vocal cord or above. Vocal cord hemangioma was rarely reported in the medical literature. Since Kimmelman et al reported vocal hemangioma in 1979 first, there are four cases of vocal hemangioma reported in medical literature. Recently, we experienced a case of vocal cord hemangioma and successfully removed it with micro-laryngeal surgery. Hence we report this case with review of literatures.

• Tuberculosis and Respiratory Diseases
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• 제51권3호
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• pp.270-274
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• 2001

성대 운동이상에 의한 상기도 폐색은 드문질환으로 저자들은 호흡곤란을 주소로 내원한 61세 여자환자에서 기관지내시경검사와 폐기능검사로 폐쇄성폐질환에 동반된 성대 운동이상에 의한 기능성상기도 폐색증을 확진하고 이완요법(relaxation)과 산소공급으로 증상이 호전되어 퇴원후 외래에서 추적관찰중인 1예를 경험하여 이를 문헌고찰과 함께 보고하는 바이다.