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Avgörande faktorer för talnaturlighet hos personer med Parkinsons sjukdom: Korrelationsstudie mellan naiva lyssnares bedömning och akustisk analys
Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Health Sciences.
2015 (Swedish)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesisAlternative title
Crtitical Factors for Speech Naturalness in People with Parkinson's Disease. : A Correlational Study between Listener Judgement and Acoustic Analysis. (English)
Abstract [sv]

Tal- och röstförändringar är vanligt förekommande hos personer med Parkinsons sjukdom. Dessa påverkar ofta talarens förståelighet men kan också ha en negativ inverkan på talets naturlighet. Forskning angående vilka faktorer som påverkar talets naturlighet är i dagsläget begränsad, varför föreliggande studie har genomförts.

Syftet med studien var att undersöka huruvida den uppfattade talnaturligheten kunde härledas till några specifika tal- och röstparametrar. I föreliggande studie konstruerades ett testbatteri för att elicitera talmaterial från åtta personer med Parkinsons sjukdom. Forskningspersonernas röster spelades in och inspelningarna graderades sedan av 27 naiva lyssnare gällande förståelighet och talnaturlighet. Korrelationstester genomfördes slutligen för att hitta eventuella samband mellan lyssnarnas bedömning och olika akustiska parametrar.

Resultatet visade att tal- och artikulationshastighet var den faktor med störst inverkan på lyssnargruppens bedömning av talnaturlighet, där de med långsammast hastighet bedömdes ha mest onaturligt tal. Vidare fanns starka indikationer på att grad av förståelighet korrelerade med bedömningen av talnaturlighet. I föreliggande studie tycktes inga övriga akustiska parametrar ha en statistiskt signifikant korrelation med lyssnargruppens bedömning av talnaturlighet.

Abstract [en]

Speech and voice changes are common in Parkinson’s disease. These changes can affect the speaker’s intelligibility but can also have a negative impact on the perceived naturalness of speech. The research available regarding the different factors that affect speech naturalness is scarce, which was the motivation behind this study.

The aim of the present study was to investigate whether the level of perceived speech naturalness could derive from any specific aspects of speech. This was accomplished by recording speech samples from eight people with Parkinson’s disease using a test battery with various speech tasks. These samples were presented to a group of 27 naive listeners whose task was to judge the level of intelligibility as well as the level of speech naturalness. Correlations were then made between their assessments and various acoustic measurements.

The main finding of the present study was that speech and articulation rate seemed to have the greatest impact on the perceived level of naturalness, where the people who had the slowest rate were judged to be the least natural sounding. Furthermore there were strong indications that the level of intelligibility correlated with the level of speech naturalness. In this study there were no other acoustic correlates found with statistical significance.

Place, publisher, year, edition, pages
2015. , 51 p.
Keyword [en]
Speech naturalness, Parkinson's disease, Intelligibility, Speech rate
Keyword [sv]
Talnaturlighet, Parkinsons sjukdom, Förståelighet, Talhastighet
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-118886OAI: oai:DiVA.org:liu-118886DiVA: diva2:817234
Subject / course
Master (one year thesis)/Speech and Language Pathology
Supervisors
Examiners
Available from: 2015-06-05 Created: 2015-06-04 Last updated: 2015-06-05Bibliographically approved

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