Predicting Intelligibility Gains in Dysarthria Through Automated Speech Feature Analysis
Publication: Journal of Speech, Language, and Hearing Research
Volume 60, Number 11
Pages 3058-3068
Abstract
Purpose
Behavioral speech modifications have variable effects on the intelligibility of speakers with dysarthria. In the companion article, a significant relationship was found between measures of speakers' baseline speech and their intelligibility gains following cues to speak louder and reduce rate (Fletcher, McAuliffe, Lansford, Sinex, & Liss, 2017). This study reexamines these features and assesses whether automated acoustic assessments can also be used to predict intelligibility gains.
Method
Fifty speakers (7 older individuals and 43 with dysarthria) read a passage in habitual, loud, and slow speaking modes. Automated measurements of long-term average spectra, envelope modulation spectra, and Mel-frequency cepstral coefficients were extracted from short segments of participants' baseline speech. Intelligibility gains were statistically modeled, and the predictive power of the baseline speech measures was assessed using cross-validation.
Results
Statistical models could predict the intelligibility gains of speakers they had not been trained on. The automated acoustic features were better able to predict speakers' improvement in the loud condition than the manual measures reported in the companion article.
Conclusions
These acoustic analyses present a promising tool for rapidly assessing treatment options. Automated measures of baseline speech patterns may enable more selective inclusion criteria and stronger group outcomes within treatment studies.
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Information & Authors
Information
Published In
Journal of Speech, Language, and Hearing Research
Volume 60 • Number 11 • November 2017
Pages: 3058-3068
PubMed: 29075755
Copyright
Copyright © 2017 American Speech-Language-Hearing Association.
History
- Received: Dec 15, 2016
- Revised: Jun 27, 2017
- Accepted: Jun 27, 2017
- Published in issue: Nov 9, 2017
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