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성대마비와 양성 성대점막질환의 음향학적 특성비교
Comparative Study on Acoustic Characteristics of Vocal Fold Paralysis and Benign Mucosal Disorders of Vocal Fold

공일승   (전북대학교 의학전문대학원 이비인후과학교실, 음성과학연구소UU0001120  ); 조영주   (전북대학교 의학전문대학원 이비인후과학교실, 음성과학연구소UU0001120  ); 이명희   (전북대학교 의학전문대학원 이비인후과학교실, 음성과학연구소UU0001120  ); 김종승   (전북대학교 의학전문대학원 이비인후과학교실, 음성과학연구소UU0001120  ); 양윤수   (전북대학교 의학전문대학원 이비인후과학교실, 음성과학연구소UU0001120  ); 홍기환   (전북대학교 의학전문대학원 이비인후과학교실, 음성과학연구소UU0001120  );
  • 초록

    This study aims to analyze the voices of the patients with voice disorders including vocal fold paralysis, vocal fold cyst and vocal nodule/polyp in the aspect of acoustic phonetics. This study intends to collect subsidiary acoustic data in order to make a speech treatment and an standardization of vocal disorders. Subjects and Methods: The subjects of this study were 64 adult patients who underwent indirect laryngoscopy and laryngostroboscopy, and were diagnosed as vocal fold paralysis, vocal fold cyst or vocal nodule/polyp. Experimental group consisted of 20 patients who were diagnosed as vocal fold paralysis, 21 patients who were diagnosed as vocal fold cyst and had the average age of 42.0 $({\pm}10.03)$ ; and 23 patients who were diagnosed as vocal nodule/polyp and had the average age of 40.9 $({\pm}13.75)$ . For the methodology of this study, the patients listed above were asked to sit in a comfortable position at intervals of 10cm apart from the patient's mouth and a microphone, and subsequently to phonate a vowel sound /e/ for the maximum phonation time with natural tone and vocal volume then the sound was directly inputted on a computer. During recording, sampling rate was set to 44,100Hz and the 1-second area corresponding to stable zone except the first and the last stage of waveform of the vowel sound /e/ vocalized by the individual patients was analyzed. Results: First, there was no statistically significant difference in jitter and shimmer between vocal fold paralysis and vocal fold cyst, while there was highly statistically significant difference in them between vocal fold paralysis and vocal nodule/polyp. Second, looking into the mean values obtained from NNE, HNR and SNR results associated with noise ratio, the disease showing the most abnormal characteristics was vocal fold paralysis, followed by cyst and nodule/polyp in order. For NNE, there was statistically significant difference between vocal nodule/polyp, and cyst or paralysis. In other words, it was found that the NNE of vocal nodule/polyp was weaker than that of cyst or paralysis. Similarly, HNR and SNR also showed the same characteristics; there was statistically significant difference between vocal fold paralysis and vocal fold cyst or nodule/polyp, and HNR and SNR values of vocal fold paralysis were lower than those of vocal fold cyst or nodule/polyp. Conclusion: For vocal fold paralysis, the abnormal values of acoustic parameters associated with frequency, amplitude and noise ratio were statistically significantly higher than those of vocal fold cyst and nodule/polyp. This finding suggests that the voices of the patients with vocal fold paralysis are the most severely injured due to less stability of vocal fold movement, asymmetry and incomplete glottic closure. In addition, there was no statistically significant difference in the acoustic parameters of tremor among vocal fold paralysis, vocal fold cyst and vocal nodule/polyp. Further studies need to ascertain reasonable acoustic parameters with various vocal disorders as well as to clarify the correlation between acoustics-based objective tools and subjective evaluations.


  • 주제어

    음향지표 .   성대마비 .   점막질환.  

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  • 공일승 (2)

    1. 2007 "편도적출술이 구강 및 비강 음향스팩트럼에 미치는 영향" 大韓音聲言語醫學會誌 = The journal of the Korean Society of Logopedics and Phoniatrics 18 (1): 33~38    
    2. 2010 "수술적으로 치료한 원발성 부갑상선 기능항진증을 동반한 부갑상선종의 임상적 고찰" 대한 두경부 종양 학회지 = Korean journal of head & neck oncology 26 (1): 9~13    
  • 조영주 (5)

  • 이명희 (1)

  • 김종승 (2)

  • 양윤수 (24)

  • 홍기환 (67)

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