• Speech Sciences
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• v.10 no.3
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• pp.29-36
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• 2003

The purposes of this study was to conduct a correlational analysis among $F_^{0}$, 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 $F_^{0}$ 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.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.12 no.2
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• pp.115-120
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• 2001

In this paper, we synthesized vowel /ae/ with voice synthesis program of Dr. Speech Science, and we also synthesized pathologic vowel /ae/ by some parameters such as high frequency gain (HFG), low frequency gain(LFG), pitch flutter(PF) which represents jitter value and flutter of amplitude(FA) which represents shimmer value, and grade ranked as mild, moderate and severe respectively. And then we analysed all pathologic voice by analysis program of Dr. Speech Science. We expect that this synthesized pathologic voices are useful for understanding the parameter such as noise, jitter and shimmer and feedback effect to patient with voice disorder.

• Proceedings of the KSPS conference
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• 2002.11a
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• pp.47-50
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• 2002

This paper is to introduce 'Dr. Speaking', which was recently developed by Eonon Inc.. 'Dr. Speaking' is an English pronunciation tutoring system. This has three distinguishing features. First, it teaches how to organize a speaker's vocal organs to pronounce accurately. Second, after it compares a speaker's pronunciation with that of a native speaker's, it grades that speaker's pronunciation level according to phonetic standards. Third, it provides proper information necessary for correcting a speaker's incorrect pronunciation. It is not always easy for a tutoring system to execute the above three almost simutaneously. However, 'Dr. Speaking' proved itself that it is possible by adding speech technology (e.g. speech recognition) to phonetic knowledge.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.8 no.2
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• pp.166-172
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• 1997

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.

• Proceedings of the KSPS conference
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• 2002.11a
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• pp.133-136
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• 2002

The purpose of this study was to determine the correlation between the Average Fundamental Frequency, Fo-Tremor Frequency, Jitter, Shimmer, Amplitude Tremor Intensity Index, and Noise to Harmonic Ratio of MDVP and Fo, Fo Tremor, Jitter, Shimmer, Amp Tremor, HNR, and NNE of Dr. Speech. The Pearson correlation coefficient was used for analysis. The results showed that there was a strong correlation between Fo and Shimmer of both instruments. However, the remaining parameters did not show a significant correlation.

• Proceedings of the KSLP Conference
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• 1996.11a
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• pp.87-87
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• 1996

객관적인 검사도구인 Dr. Speech Science(DSS)의 음성평가 결과가 갖는 의미를 알아보고자 이 연구를 하였다. 성대결절환자 여자 성인 25명을 대상으로 DSS를 이용한 음성평가와 청각심리적 검사방법인 GRBAS와의 관계를 비교 분석하였다. 청각심리적 검사인 GRBAS의 0, 1, 2, 3의 각 Grade에 따라 DSS의 음성평가의 결과와 비교하였다. DSS의 음성평가 결과로서 Grade가 0, 1, 2인 경우 총 15례중 1례를 제외한 모든 경우에 있어서 hoarseness, harshness, breathiness항목에서 정상소견을 나타냈으며 Grade가 3인 경우에는 총 10례 중 6례에서 hoarseness, harshness, breathiness항목에서 정상소견을 나머지 4례에서는 hoarseness에서 slight한 정도를 보여주었다.

• Speech Sciences
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• v.1
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• pp.213-223
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• 1997

This paper deals with a general review of Mieko S. Han, who made a significant contribution to the studies of Korean phonetics during the 1960' s and early 1970' s. As both a single and joint author, Dr. Han published important papers in both quantity and quality, which have been cited among Korean phoneticians until today. Before Dr. M. Han' s work, professor of USC in the department of East Asian Languages & Cultures, there were only a few phonetics-related publications in Korea, most of which are papers or books based on non-experimental traditional approach. It is known that there was coexistence between traditionalism and structuralism in the field of Korean linguistics. It was, however, fortunate that we had two important phoneticians (M. Han and Chin-W Kim) abroad at that time. Mieko Han' s concern was to investigate experimental characteristics of the system of Korean vowels and consonants using a Spectrograph, which was the single most important tool for analysing phonetic data at that time. Dr. Han conducted her experimental studies on Korean phonetics, mostly funded by the Office of Naval Research, in terms of duration, fundamental frequency, Voice Onset Time (VOT), intensity, and so on. This paper aims to re-appreciate Dr. Han's specific contribution to the study of Korean phonetics since she played an important role as a pioneer of early Korean phonetics. Further, it is highly recommended that Dr. Han's works can be extremely useful for a graduate student, who seriously would like to specialize in Korean phonetics in the first step.

• Speech Sciences
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• v.12 no.4
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• pp.215-226
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• 2005

This study is an attempt to investigate effect of pitch treatment program using visual feedback for profound deaf adults. Dr. Speech program was applied as a training tool. The subjects of this study were 3 profound deaf adults. Speech samples for evaluation were vowel prolongations and connected speech. Analysis was performed under the principle of single subject research design. As results of this study, all subjects showed the treatment effects which were represented by lowering fundamental frequency and speaking fundamental frequency.

• Proceedings of the KSLP Conference
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• 2001.11a
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• pp.168-168
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• 2001

• Speech Sciences
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• v.10 no.3
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• pp.79-86
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• 2003

This study compared the voices of ministers and priests. There. has been a common notion that ministers is more passionate than priests in delivering their speech. Therefore, it can be assumed that ministers abuses or misuses his/her voice compared to priests. This study attempted acoustic analysis of the voices of 6 ministers and .5 priests before and after their speech. We measured F0, jitter, shimmer, NNE and HNR using Dr. Speech (Version 4.0, Tiger DRS). A t-test was performed to determine any objective differences of their voices. The results showed that there were no significant differences in the voices of ministers and priests before and after their speech. However, there seemed to be an interesting reversed tendency between ministers and priests, although it did not reach a statistical significance. That is, P0 tended to increase after the speech in ministers, whereas it tended to decrease in priests. In addition, HNR tended to decrease after the speech in priests, while it tended to increase in ministers.