Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics (대한후두음성언어의학회지)

The Korean Society of Laryngology, Phoniatrics and Logopedics. (대한후두음성언어의학회)
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New Parameter on Speech and EGG; Glottal Closure Delay Ratio

음성신호와 전기성문파를 이용하는 새로운 매개변수 ; 성대 폐쇄 지연비율(Glottal Closure Delay Ratio)

  • Choi, Jong-Min (Interdisciplinary Program in Biomedical Engineering, Seoul National University) ;
  • Kwon, Tack-Kyun (Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University, College of Medicine) ;
  • Jung, Eun-Jung (Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University, College of Medicine) ;
  • Lee, Myung-Chul (Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University, College of Medicine) ;
  • Kim, Kwang-Hyun (Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University, College of Medicine) ;
  • Sung, Myung-Whun (Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University, College of Medicine) ;
  • Park, Kwang-Suk (Interdisciplinary Program in Biomedical Engineering, Seoul National University)
  • 최종민 (서울대학교 대학원 협동과정 의용생체공학) ;
  • 권택균 (서울대학교 의과대학 이비인후과학교실) ;
  • 정은정 (서울대학교 의과대학 이비인후과학교실) ;
  • 이명철 (서울대학교 의과대학 이비인후과학교실) ;
  • 김광현 (서울대학교 의과대학 이비인후과학교실) ;
  • 성명훈 (서울대학교 의과대학 이비인후과학교실) ;
  • 박광석 (서울대학교 대학원 협동과정 의용생체공학)
  • Published : 2007.06.15
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Abstract

Background and Objectives: Biomedical signals have been usually used for the diagnosis of the laryngeal function such as speech, electroglottograph(EGG), airflow and other signals. But, in most cases these signals were analysed separately. Here, we propose a new interchannel parameter Glottal Closure Delay Ratio(GCDR) which is estimated from speech and EGG measured simultaneously. Materials and Method: Speech and EGG signal were recorded simultaneously from 13 normal subjects, 39 patients. The patients' data included 16 polyps and 23 vocal folds palsy. Time difference between glottal closing instance on EGG and the first maximum peak on speech in a pitch period was calculated. Glottal closing instance was defined as the maximum peak on the first derivative of EGG signal(dEGG). Results: The standard deviation and jitter were calculated using 20-30 GCDRs extracted from each data, and they are significant different between normal and vocal fold paralysis group. Conclusion: The GCDR may be the first index reflecting speech and EGG characteristics and the perturbation of this parameter was significant different between normal and vocal fold paralysis group.

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