Little is known about the minimum sample length required for the stable acoustic assessment of speech in Parkinson's disease (PD). This study aimed to investigate the effect of the duration of the reading passage on the determination of reliable acoustic patterns in individuals with PD treated with subthalamic nucleus deep brain stimulation. A phonetically balanced reading text of 313 words was collected from 32 Czech persons with PD, and 32 age- and sex-matched healthy controls. The reading passage was segmented to produce ten sub-texts of increasing length ranging from a one- to a ten-segment-long sub-text. An error rate analysis was used to estimate the required stabilization value by evaluating the differences between the sub-texts and the entire text across seven hypokinetic dysarthria features. The minimum length of a reading passage equal to 128 words was found to be necessary for acoustic assessment, with similar lengths being required for the controls (120 words) and the two PD subgroups, including Parkinsonian individuals with a mild (126 words) and moderate (128 words) dysarthria severity. The current study provides important guidelines for the necessary sample length for future expert instrumental dysarthria assessments and assists in decreasing the time required for clinical speech evaluations.
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May 19 2021
Effect of reading passage length on quantitative acoustic speech assessment in Czech-speaking individuals with Parkinson's disease treated with subthalamic nucleus deep brain stimulation
Petr Krýže;
Petr Krýže
1
Department of Circuit Theory, Faculty of Electrical Engineering, Czech Technical University
, Prague, Czech Republic
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Tereza Tykalová;
Tereza Tykalová
1
Department of Circuit Theory, Faculty of Electrical Engineering, Czech Technical University
, Prague, Czech Republic
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Evžen Růžička;
Evžen Růžička
2
Department of Neurology and Centre of Clinical Neuroscience, First Faculty of Medicine, Charles University
, Prague, Czech Republic
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Petr Krýže
1
Tereza Tykalová
1
Evžen Růžička
2
Jan Rusz
1,a)
1
Department of Circuit Theory, Faculty of Electrical Engineering, Czech Technical University
, Prague, Czech Republic
2
Department of Neurology and Centre of Clinical Neuroscience, First Faculty of Medicine, Charles University
, Prague, Czech Republic
a)
Also at: Department of Neurology and Centre of Clinical Neuroscience, First Faculty of Medicine, Charles University, Prague, Czech Republic. Electronic mail: [email protected]
J. Acoust. Soc. Am. 149, 3366–3374 (2021)
Article history
Received:
January 11 2021
Accepted:
April 29 2021
Citation
Petr Krýže, Tereza Tykalová, Evžen Růžička, Jan Rusz; Effect of reading passage length on quantitative acoustic speech assessment in Czech-speaking individuals with Parkinson's disease treated with subthalamic nucleus deep brain stimulation. J. Acoust. Soc. Am. 1 May 2021; 149 (5): 3366–3374. https://doi.org/10.1121/10.0005050
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