《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2021, Vol. 27 ›› Issue (1): 43-47.doi: 10.3969/j.issn.1006-9771.2020.00.023

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Relationship between Vowel Production and Speech Clarity in Post-stroke Dysarthria Patients

GE Sheng-nan1,2, WANG Yong-li1,2, YIN Min-min3, WAN Qin1,2, QIAN Hong4, HUANG Zhao-ming1,2   

  1. 1. Chinese Academy of Speech and Hearing Rehabilitation Science and ICF Application, East China Normal University, Shanghai 200333, China
    2. Department of Rehabilitation Science, East China Normal University, Shanghai 200333, China
    3. Department of Special Education, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
    4. Department of Rehabilitation Medicine, Shanghai Fifth Rehabilitation Hospital, Shanghai 201600, China
  • Received:2020-07-21 Revised:2020-08-26 Published:2021-01-25 Online:2021-01-27
  • Contact: WANG Yong-li, E-mail: wylkangfu@126.com
  • Supported by:
    National Social Science Foundation (Youth) (No. 19CYY019)

Abstract: Objective To explore the characteristics of vowel production of dysarthria after stroke, and the relationship between vowel production and speech clarity. Methods From October, 2019 to January, 2020, 19 patients with post-stroke dysarthria and 18 healthy controls were asked to read a short essay to extract vowels, and measured the jaw distance, tongue distance, F2i/F2u, vowel space area (VSA), vowel articulation index (VAI), F1 and F2 variability, and speech clarity. The correlation between vowel production and speech clarity were analyzed. Results Tongue distance, F2i/F2u, VSA, VAI, and speech clarity were less in the patients than in the controls (|t| > 2.268, P < 0.05), while F2 variability was more (t = 2.375, P < 0.05). F2i/F2u (r = 0.465), VAI (r = 0.488) and F2 variability (r = -0.504) were correlated to speech clarity (P < 0.05). Conclusion The vowel production impaired in patients with post-stroke dysarthria, featured as abnormal articulatory movements, concentration of vowels and poor stability of vowels, which impacts the speech clarity.

Key words: stroke, dysarthria, vowel production, acoustic analysis, speech clarity

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