Differences in GRBAS scales and shimmer according to vocal sample types in people with vocal disorders

음성장애와 샘플유형에 따른 GRBAS 측정치 및 shimmer 비교

  • 신유정 (전북대학교 임상언어병리학과) ;
  • 홍기환 (전북대학교 의학전문대학원 이비인후과학교실) ;
  • 심현섭 (이화여자대학교 대학원 언어병리학과)
  • Received : 2011.08.02
  • Accepted : 2011.09.20
  • Published : 2011.09.30

Abstract

The purpose of the present study was to identify the differences in GRBAS scales between vocal sample types (sustained vowels and connected speech) for specific laryngeal conditions (vocal nodules, vocal polyps and vocal paralysis) and the relations between GRBAS scale and Shimmer value in each vocal sample type. In this study, the total of 60 voice samples of 30 patients (10 vocal nodules, 10 vocal polyps, 10 vocal paralysis) were examined and MDVP (Multi-dimensional Voice Program) was used to analyze Shimmer value. Three listeners rated two types of samples which were sorted randomly based on GRBAS scale. Three-way ANOVA, one-way ANOVA and paired t-test were used. The outcome of this study was as follow. 1) GRBAS scales varied in vocal sample types. Listeners tended to assess voices as better quality when they listened connected speech rather than sustained vowels. 2) G score of GRBAS and Shimmer were positively correlated with statistical significance. This results show that 1) vocal specialists should consider the sample types in evaluating the severity of voice problem and 2) G score could be a simple and clear method.

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