Effect of clear speech intervention program on speech intelligibility in persons with idiopathic Parkinson’s disease: A pilot study

Shin, Hee-Baek; Shivabasappa, Prarthana; Koul, Rajinder

doi:10.1080/17549507.2021.1943522

Cited by 5 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar increases in vowel contrast are a common target of clinical interventions for motor speech disorders, such as the hypokinetic dysarthria associated with Parkinson's disease (Darley et al, 1969;Pinto et al, 2004;Enderby, 2013), as they are related to increases in speech intelligibility (Weismer et al, 2001;Lam & Tjaden, 2016;Sapir et al, 2007;Tjaden et al, 2013;Whitfield & Goberman, 2014; see also Kain et al, 2007). Several such interventions explicitly instruct patients to adopt and practice a style of speech that is "clear" (e.g., Park et al, 2016;Shin et al, 2022). Clear vs. habitual speech is characterized by greater vowel contrast (Uchanski, 2005;Smiljanić & Bradlow, 2009), which prompts the question of whether the effects we measured could be due not to implicit adaptation, but to purposeful hyperarticulation.…”

Section: Discussionmentioning

confidence: 99%

Increased vowel contrast and intelligibility in connected speech induced by sensorimotor adaptation

Beach,

Johnson,

Parrell

et al. 2024

Preprint

View full text Add to dashboard Cite

SummaryAlterations to sensory feedback can drive robust adaptive changes to the production of consonants and vowels, but these changes often have no behavioral relevance or benefit to communication (e.g., making “head” more like “had”). This work aims to align the outcomes of adaptation with changes known to increase speech intelligibility – specifically, adaptations that increase the acoustic contrast between vowels in running speech. To this end, we implemented a vowel centralization feedback perturbation paradigm that pushes all vowels towards the center of vowel space, making them sound less distinct from one another. Speakers across the adult lifespan adapted to the centralization perturbation during sentence production, increasing the global acoustic contrast among vowels and the articulatory excursions for individual vowels. These changes persisted after the perturbation was removed, including after a silent delay, and showed robust transfer to words that were not present in the sentences. Control analyses demonstrated that these effects were unlikely to be due to explicit pronunciation strategies and occurred in the face of increasingly more rapid and less distinct production of familiar sentences. Finally, sentence transcription by crowd-sourced listeners showed that speakers’ vowel contrast predicted their baseline intelligibility and that experimentally-induced increases in contrast predicted intelligibility gains. These findings establish the validity of a sensorimotor adaptation paradigm to implicitly increase vowel contrast and intelligibility in connected speech, an outcome that has the potential to enhance rehabilitation in individuals who present with a reduced vowel space due to motor speech disorders, such as the hypokinetic dysarthria associated with Parkinson’s disease.

show abstract

Section: Discussionmentioning

confidence: 99%

Increased vowel contrast and intelligibility in connected speech induced by sensorimotor adaptation

Beach,

Johnson,

Parrell

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Impact of Face Masks on Speech in Parkinson's Disease: Effect of Clear and Loud Speech Styles

Knowles

Badh

2023

J Speech Lang Hear Res

View full text Add to dashboard Cite

Purpose: The purpose of this study is to quantify the combined effects of face masks and effortful speech styles on speech intensity, spectral moments, and measures of spectral balance in talkers with Parkinson's disease. Method: Fifteen people with Parkinson's disease and 15 healthy, older controls read aloud sentences in three face mask conditions and three speech style conditions. Mask conditions included no mask, surgical masks, and KN95 masks. Speech styles included habitual, clear, and loud. Acoustic measures of intensity, spectral moments, and spectral balance were modeled as a function of speaker group, mask, and speech style. Results: Overall, talkers with PD demonstrated lower concentrations of high-frequency spectral energy in their speech. Face masks attenuated high-frequency energy, whereas clear followed by loud speaking styles amplified high frequencies. Overall, the attenuation observed by face masks was preserved across speech styles, and both mask and speech patterns were observed to be similar across groups. Discussion: Clear and loud speech styles were effective in compensating for the damping effects of masks in talkers with and without PD. However, given that people with PD demonstrated poorer overall spectral balance compared to controls, the gains afforded by speaking clearly or loudly may be limited when wearing a face mask.

show abstract

Sex Differences in the Speech of Persons With and Without Parkinson's Disease

Houle,

Feaster,

Mira

et al. 2024

Am J Speech Lang Pathol

View full text Add to dashboard Cite

Background: Sex differences are apparent in the prevalence and the clinical presentation of Parkinson's disease (PD), but their effects on speech have been less studied. Method: Speech acoustics of persons with (34 females and 34 males) and without (age- and sex-matched) PD were examined, assessing the effects of PD diagnosis and sex on ratings of dysarthria severity and acoustic measures of phonation (fundamental frequency standard deviation, smoothed cepstral peak prominence), speech rate (net syllables per second, percent pause ratio), and articulation (articulatory–acoustic vowel space, release burst precision). Results: Most measures were affected by PD (dysarthria severity, fundamental frequency standard deviation) and sex (smoothed cepstral peak prominence, net syllables per second, percent pause ratio, articulatory–acoustic vowel space), but without interactions between them. Release burst precision was differentially affected by sex in PD. Relative to those without PD, persons with PD produced fewer plosives with a single burst: females more frequently produced multiple bursts, whereas males more frequently produced no burst at all. Conclusions: Most metrics did not indicate that speech production is differentially affected by sex in PD. Sex was, however, associated with disparate effects on release burst precision in PD, which deserves further study. Supplemental Material: https://doi.org/10.23641/asha.24388666

show abstract

Effect of clear speech intervention program on speech intelligibility in persons with idiopathic Parkinson’s disease: A pilot study

Cited by 5 publications

References 36 publications

Increased vowel contrast and intelligibility in connected speech induced by sensorimotor adaptation

Increased vowel contrast and intelligibility in connected speech induced by sensorimotor adaptation

Impact of Face Masks on Speech in Parkinson's Disease: Effect of Clear and Loud Speech Styles

Sex Differences in the Speech of Persons With and Without Parkinson's Disease

Contact Info

Product

Resources

About