Relationship between acoustic measures and speech naturalness ratings in Parkinson's disease: A within-speaker approach.

This study investigated the acoustic basis of across-utterance, within-speaker variation in speech naturalness for four speakers with dysarthria secondary to Parkinson's disease (PD). Speakers read sentences and produced spontaneous speech. Acoustic measures of fundamental frequency, phrase-final syllable lengthening, intensity and speech rate were obtained. A group of listeners judged speech naturalness using a nine-point Likert scale. Relationships between judgements of speech naturalness and acoustic measures were determined for individual speakers with PD. Relationships among acoustic measures also were quantified. Despite variability between speakers, measures of mean F0, intensity range, articulation rate, average syllable duration, duration of final syllables, vocalic nucleus length of final unstressed syllables and pitch accent of final syllables emerged as possible acoustic variables contributing to within-speaker variations in speech naturalness. Results suggest that acoustic measures correlate with speech naturalness, but in dysarthric speech they depend on the speaker due to the within-speaker variation in speech impairment. PMID: 26403503 [PubMed - as supplied by publisher]
Source: Clinical Linguistics and Phonetics - Category: Speech Therapy Authors: Tags: Clin Linguist Phon Source Type: research

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Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research
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Source: BBC News | Health | UK Edition - Category: Consumer Health News Source Type: news
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Source: Brain and Behavior - Category: Neurology Authors: Tags: ORIGINAL RESEARCH Source Type: research
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Source: Brain and Behavior - Category: Neurology Authors: Tags: ORIGINAL RESEARCH Source Type: research
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