Phonetics and Speech Sciences (말소리와 음성과학)

Korean Society of Speech Sciences (한국음성학회)
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Characteristics of Speech Intelligibility and the Vowel Space in Patients with Parkinson's disease

파킨슨병 환자의 말 명료도와 모음 공간 특성

  • 심희정 (한림대학교 일반대학원) ;
  • 박원경 (한림대학교 보건과학대학원) ;
  • 고도흥 (한림대학교 언어청각학부)
  • Received : 2012.07.28
  • Accepted : 2012.09.14
  • Published : 2012.09.30
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Abstract

The purpose of this study was to investigate the characteristics of speech intelligibility of spontaneous speech and the vowel space parameters in patients with Parkinson's disease. Ten PD patients (M=5, F=5) and a corresponding control group of ten normal adults participated in this study. Firstly, subjects were asked to tell a story about their hometown and youth in order to analyze speech intelligibility. Secondly, the subjects were also asked to repeat four vowels (/a/, /i/, /u/, /e/) five times in order to compare their vowel spaces. The results were as follows: (1) the speech intelligibility of the PD group was lower than that of the control group. (2) Four parameters including vowel area, vowel articulatory index, formant centralization ratio, F2i/F1u ratio were significantly different in each group. For instance, vowel area and F2 ratio were wider and higher, respectively. As a result, a decrease in speech intelligibility of patients with PD is likely to show different types of errors from the normal group. The results of this research are meaningful in a sense that they could provide the objective standard of speech intelligibility and vowel space parameters.

Keywords

References

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