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Dr. Speech Science를 이용한 정상 및 후두질환 환자의 음향분석
이형석,태경,장경진,김경우,김경래,박철원,Lee, Hyung-Seok,Tae, Kyung,Jang, Kyung-Jin,Kim, Kyung-Woo,Kim, Kyung-Rae,Park, Chul-Won 대한후두음성언어의학회 1997 대한후두음성언어의학회지 Vol.8 No.2
Background : For example, aerodynamic study, vibratory study, acoustic study, neuro-muscular test and psychoacoustic evaluation, a number of objective methods are now available for assessing pathologic voice change. They help to differentiate pathologic condition from normal condition and to monitor pathologic and aging change. These laboratory analyses are used commonly to monitor speech therapy and to follow a patient's recovery after surgery. Objectives : We investigated the values of jitter, shimmer and NNE of normal person and hoarseness patients in Korea. The values of Jitter and shimmer might be meaningful parameters distinguishing pathologic vibration from normal and recovery after surgery. Materials and Methods : Statistical significance between normal control and 48 subjects taken microlaryngeal surgery were compared with Dr. speech science program that is computerized system for acoustic analysis of voice production employed to determine vocal characteristics of pitch perturbation(jitter) and amplitude perturbation(shimmer). Results : The mean normal values of jitter and shimmer were 0.226${\pm}$0.110(%), 2.200${\pm}$0.421(%) in male and 0.164${\pm}$0.060(%), 2.063 ${\pm}$0.575(%) in female. In patients with vocal nodule, the preoperative and postoperative values of jitter and shimmer were valueless. In patients with vocal polyps, the preoperative and postoperative values of jitter and shimmer were valuable. Conclusion : Dr. speech science program was effective to monitor laryngeal disease and aging changes.
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MDVP와 Praat, Dr. Speech간의 음향학적 측정치에 관한 상관연구
유재연,정옥란,장태염,고도홍 한국음성과학회 2003 음성과학 Vol.10 No.3
The purpose of this study was to conduct a correlational analysis among Fo, Jitter, Shimmer, and NHR(HNR), and NNE estimated by three speech analysis softwares, MDVP, Praat and Dr, Speech. Thirty females and 15 males with normal voice participated in the study. We used Sound Forge 6.0 to record their voice. MDVP, Praat and Dr. Speech were used to measure the acoustic parameters. The Pearson correlation coefficient was determined through a statistical analysis. The results came out as follows: Firstly, there was a strong correlation between Fo and Shimmer of both instruments. However, there was no correlation between Jitter of both instruments. Secondly, Shimmer showed a stronger correlation with HNR, NHR, and NNE than Jitter. Therefore, Shimmer was considered to be more useful and sensitive parameter to identify dysphonic voice compared to Jitter.
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성악전공 대학생과 일반 대학생의 /a/ 연장발성 시 음성특성 비교
유재연(Jae-Yeon Yoo),안종복(Jong-Bok Ahn),권도하(Do-Ha Kwon),정옥란(Ok-Ran Jeong) 한국언어청각임상학회 2002 Communication Sciences and Disorders Vol.7 No.2
본 연구는 65명의 성악전공 대학생(남자 27명, 여자 38명)과 80명의 일반 대학생(남자 30명, 여자 50명)을 대상으로 Dr. speech(version 4.0)를 이용하여 두 집단 간에 음향학적 측정치(Jitter, Shimmer, HNR, NNE)와 EGG 측정치(EGG Jitter, EGG Shimmer , EGG HNR, EEG NNE)에서 어떤 차이가 있는가를 알아보는 것을 목적으로 실시하였다. 그 결과 다음과 같은 연구 결과를 얻었다. 첫째, 성악전공 대학생들의 음향학적 측정치에서 Jitter치는 0.18 %, Shimmer치는 0.28 ± 0.66 %, HNR치는 27.05 ± 2.70 dB, NNE치는 - 15.51 ± 3.18 dB로 나타났고, EGG 측정에서는 EGG Jitter치는 0.19 %, EGG Shimmer치는 1.23 ± 0.78 %, EGG HNR치는 27.04 ± 2.68 dB, EGG NNE치는 - 24.17 ± 2.63 dB로 나타났다. 둘째, 일반 대학생들의 음향학적 측정치에서 Jitter치는 0.31 ± 0.11%, Shimmer치는 2.09 ± 0.74 %, HNR치는 28.81 ± 2.67 dB, NNE치는 - 11.73 ± 3.94 dB로 나타났고 EGG 측정에서는 EGG Jitter치는 0.37 ± 0.18 %, EGG Shimmer치는 1.32± 1.0 %, EGG HNR치는 32.87 ± 4.56 dB, EGG NNE치는 - 30.28 ± 4.62 dB으로 나타났다. 마지막으로, 두 집단 간에 Jitter , Shimmer , HNR, NNE, EGG Jitter , EGG HNR, EGG NNE 등에서 유의한 차이(p < .001)가 나타난 반면에, EGG Shimmer에서는 두 집단 간에 유의한 차이가 나타나지 않았다. 이상의 결과는 전문적으로 발성(가창) 훈련을 받아 온 성악 전공학생 들의 일반 대학생들에 비해 음질이 대체적으로 우수한 것을 나타내며, 더 나아가 직업적 음성 사용자 중 성악을 전공하는 사람들의 음성에 대한 규준치 확립의 필요성을 시사한다. The purposes of this study were (1) to obtain acoustic measurement s (Jitter , Shimmer, HNR, and NNE) and EGG measurement s (EGG Jitter , EGG Shimmer , EGG HNR, and EGG NNE) of 65 classical singing student s (27 males and 38 females ) and 80 ordinary college student s (30 males and 50 females ) and (2) to compare acou stic and EGG parameter s between the two groups. Dr . Speech was need to obtain acou stic measurement s and EGG measurement s, simultaneously . T he subject s sustained / a/ and acou stic and EGG measurement s were taken. T he result s were as follows : fir stly, the mean value of Jitter of clas sical singing student s was 0.18 %, that of Shimmer 1.28 ± 0.66 %, that of HNR 27.05 ± 2.70 dB, and that of NNE - 15.51 ± 3.18 dB. Secondly , the mean value of EGG Jitter of clas sical singing student s was 0.19 %, that of EGG Shimmer 1.23 ± 0.78 %, that of EGG HNR 27.04 ± 2.68 dB, and that of EGG NNE - 24.17 ± 2.63 dB. T hirdly , the mean value of Jitter of ordinary college student s was 0.31 ± 0.11 %, that of Shimmer 2.09 ± 0.74 %, that of HNR 28.81 ± 2.67 dB, and that of NNE - 11.73 ± 3.94 dB. Fourthly , the mean value of EGG Jitter of ordinary college student s was 0.37 ± 0.18 %, that of EGG Shimmer 1.32 ± 1.0 %, that of EGG HNR 32.87 ± 4.56 dB, and that of EGG NNE - 30.28 ± 4.62 dB. Finally , there was a significant difference between the two groups in Jitter , Shimmer , HNR, NNE, EGG Jitter , EGG HNR, EGG NNE (p < .001) while there was no significant difference between the two groups in EGG Shimmer.
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