Medicine and Health Sciences Commons^™

Acoustic-Perceptual Relations Between Fundamental Frequency And Expressiveness In Speakers With Hypokinetic Dysarthria, Alena Portnova

All Graduate Theses and Dissertations, Fall 2023 to Present

Hypokinetic dysarthria is a motor speech disorder that occurs in patients with Parkinson’s disease (PD) and affects not only their speech intelligibility but also how their attitudes and emotions are perceived by listeners. People with PD have been judged as less happy, involved, friendly, and interested based only on their speech samples. A lack of speech expressiveness is one of the characteristics that is likely to be related to these negative listener judgments. Specifically, it has been suggested that a lack of fundamental frequency (F0) variation reduces speakers’ ability to express various emotions. To investigate whether speech expressiveness is related …

Speech Intelligibility Assessment: Predicting “Noncompliant” Listener Behavior, Briggs Kroff

Undergraduate Honors Capstone Projects

Purpose: When researching speech intelligibility among people with dysarthria, convenience sampling has typically been used to recruit listeners. A new online crowdsourcing method, Mechanical Turk (MTurk), results in ecologically valid results, but outlier results are often removed from the analysis and considered "noncompliant". This study aims to examine whether there is a relationship between age, gender, speech/language/hearing impairment, and whether someone is "noncompliant".

Methods: 16 speakers, both with and without dysarthria, were recorded while they read prewritten sentences. Research participants found through MTurk then listened to the sentences and transcribed them. They also were asked questions including their …

Understanding Dysrhythmic Speech: When Rhythm Does Not Matter And Learning Does Not Happen, Stephanie A. Borrie, Kaitlin L. Lansford, Tyson S. Barrett

Communicative Disorders and Deaf Education Faculty Publications

A positive relationship between rhythm perception and improved understanding of a naturally dysrhythmic speech signal, ataxic dysarthria, has been previously reported [Borrie, Lansford, and Barrett. (2017). J. Speech Lang. Hear. Res. 60, 3110–3117]. The current follow-on investigation suggests that this relationship depends on the nature of the dysrhythmia. When the corrupted rhythm cues are relatively predictable, affording some learnable acoustic regularity, the relationship is replicated. However, this relationship is nonexistent, along with any intelligibility improvements, when the corrupted rhythm cues are unpredictable. Findings highlight a key role for rhythm perception and distributional regularities in adaptation to dysrhythmic speech.