A1 Refereed original research article in a scientific journal
Prosodic features in Finnish-speaking adults with Parkinson's disease
Authors: Penttilä Nelly, Tavi Lauri, Hyppönen Marianne, Rontu Katariina, Rantala Leena, Werner Stefan
Publisher: TAYLOR & FRANCIS INC
Publication year: 2022
Journal: Clinical Linguistics & Phonetics
Journal name in source: CLINICAL LINGUISTICS & PHONETICS
Journal acronym: CLIN LINGUIST PHONET
Number of pages: 16
ISSN: 0269-9206
eISSN: 1464-5076
DOI: https://doi.org/10.1080/02699206.2022.2081612
Web address : https://www.tandfonline.com/doi/full/10.1080/02699206.2022.2081612
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/176064659
The aim of this study was to assess prosodic features in Finnish speakers with (n = 16) and without (n = 20) Parkinson’s disease (PD), as there are no published studies to date of prosodic features in Finnish speakers with PD. Chosen metrics were articulation rate (syllables/second), pitch (mean F0) and pitch variability (standard deviation F0), energy proportion below 1 kHz (epb1kHz), normalised pairwise variability index (nPVI), and a novel syllabic prosody index (SPI). Four statistically significant results were found: (1) energy was distributed more to lower frequencies in speakers with PD compared to control speakers, (2) male PD speakers had higher pitch and (3) higher syllabic prosody index compared to control males, and (4) female PD speakers had narrower pitch variability than controls. In this study, PD was manifested as less emphatic and breathier voice. Interestingly, male PD speakers’ dysprosody was manifested as an effortful speaking style, whereas female PD speakers exhibited dysprosody with a monotonous speaking style. A novel syllable-based prosody index could be a potentially useful tool in analysing prosody in disordered speech.
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