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- W2308526086 abstract "Purpose: One of the objectives of the SPACE-project (Speech Algorithms for Clinical and Educational Applications) is to develop a speech technology based clinical assessment that provides reliable quantitative analyses of pathological speech. Method: Four automatic speech processing systems were applied on monosyllabic word recordings of a standardized Dutch phoneme intelligibility assessment. Systems 1 and 2 are automatic word recognizers which provide word accuracy rates. System 1 (WAR-ACF) was supplied with standard acoustic features, system 2 (WAR-ARF) with articulatory features, derived from the acoustic features. Systems 3 (CS-ACF) and 4 (CS-ARF) are automatic speech aligners that determine the best alignment between a speech sample and its canonical phonetic transcription. Confidence scores (CS) are computed for each phoneme (system 3) or for each articulatory feature (system 4). These CS are finally converted into a global score, designed to maximally agree with the perceptual intelligibility score. Samples of 60 dysarthric speakers were analyzed objectively by the four systems and perceptually by an experienced speech-language-pathologist. Pearson correlation coefficients (r) between the objective and the perceptual intelligibility scores are estimated by means of 5-fold cross validation experiments. Results: The correlations for systems 1 and 2 were respectively found to be moderate (r:0.56) and low (r:0.33). However, the alignment-based systems resulted in much higher correlations (system 3: r:0.72; system 4: r:0.72). Conclusions: Alignment-based systems, provide more reliable intelligibility scores than recognition-based systems. No significant difference was found between working with acoustic and working with articulatory features. The current results are encouraging but further refinements are needed." @default.
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- W2308526086 date "2007-01-01" @default.
- W2308526086 modified "2023-09-26" @default.
- W2308526086 title "Speech technology based assessment of dysarthric speech: preliminary results" @default.
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