Quantitative analysis of vowel production in cerebral palsy children with dysarthria

Mou, Zhiwei; Teng, Wen; Ouyang, Hui; Chen, Yumei; Liu, Yingping; Jiang, Chenyin; Zhang, Jiawei; Chen, Zhuoming

doi:10.1016/j.jocn.2019.05.020

Cited by 12 publications

(14 citation statements)

References 14 publications

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“…Indeed, in comparison with Hebrew formant values, the current results of TD participants generally fall in between those of typical child and adult productions, as demonstrated by Most et al (2000). The current tVSA findings support and replicate previous findings of reduced VSA in speakers with developmental dysarthria in other languages (Higgins and Hodge 2002, Liu et al 2005, Lee and Hustad 2013, Chen et al 2018, Mou et al 2019. Direct comparison between the current results and those of previous studies was inapplicable in many cases due to the type of VSA analysis, as studies of English-speaking participants often report a quadrilateral VSA, not triangular (Higgins andHodge 2002, Lee andHustad 2013).…”

Section: Acoustic Findings and Implicationssupporting

confidence: 84%

“…2018, Mou et al . 2019). Direct comparison between the current results and those of previous studies was inapplicable in many cases due to the type of VSA analysis, as studies of English‐speaking participants often report a quadrilateral VSA, not triangular (Higgins and Hodge 2002, Lee and Hustad 2013).…”

Section: Resultsmentioning

confidence: 99%

“…Investigations of vowel acoustics in dysarthria have primarily been conducted in English speakers, as reviewed above, with some evidence in other languages, including Mandarin (Liu et al 2005, Hsu et al 2017, Mou et al 2019 and French (Martel-Sauvageau et al 2015). Similar to findings in English, these studies have demonstrated a reduction of the acoustic vowel space among speakers with dysarthria in comparison with healthy peers (Mandarin) or acoustic changes following treatment (French).…”

Section: Speech Intelligibility and Acoustic Measuresmentioning

confidence: 90%

“…A reduction of this area has been demonstrated in dysarthric speech in both developmental (e.g., Higgins and Hodge 2002, Mou et al . 2019), and acquired (Hsu et al . 2017) dysarthria, and is attributed to reduced movement of the articulators to their typical placement during vowel production (also termed articulatory undershoot ; Kent and Kim 2003).…”

Section: Introductionmentioning

confidence: 99%

“…In the light of the aforementioned studies (in English), we hypothesized that all vowel space measures will demonstrate some degree of vowel space centralization among the speakers with CP in comparison with TD peers (Higgins and Hodge 2002, Mou et al . 2019). Furthermore, we expected to find a correlation between (at least some of) the acoustic metrics and speech intelligibility scores.…”

Section: Introductionmentioning

confidence: 99%

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Acoustic vowel analysis and speech intelligibility in young adult Hebrew speakers: Developmental dysarthria versus typical development

Carl

Icht

2021

Intl J Lang & Comm Disor

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Background: Developmental dysarthria is a motor speech impairment commonly characterized by varying levels of reduced speech intelligibility. The relationship between intelligibility deficits and acoustic vowel space among these individuals has long been noted in the literature, with evidence of vowel centralization (e.g., in English and Mandarin). However, the degree to which this centralization occurs and the intelligibility-acoustic relationship is maintained in different vowel systems has yet to be studied thoroughly. In comparison with American English, the Hebrew vowel system is significantly smaller, with a potentially smaller vowel space area, a factor that may impact upon the comparisons of the acoustic vowel space and its correlation with speech intelligibility. Data on vowel space and speech intelligibility are particularly limited for Hebrew speakers with motor speech disorders. Aims: To determine the nature and degree of vowel space centralization in Hebrew-speaking adolescents and young adults with dysarthria, in comparison with typically developing (TD) peers, and to correlate these findings with speech intelligibility scores. Methods & Procedures: Adolescents and young adults with developmental dysarthria (secondary to cerebral palsy (CP) and other motor deficits, n = 17) and their TD peers (n = 17) were recorded producing Hebrew corner vowels within single words. For intelligibility assessments, naïve listeners transcribed those words produced by speakers with CP, and intelligibility scores were calculated. Outcomes & Results: Acoustic analysis of vowel formants (F1, F2) revealed a centralization of vowel space among speakers with CP for all acoustic metrics of vowel formants, and mainly for the formant centralization ratio (FCR), in comparison with TD peers. Intelligibility scores were correlated strongly with the FCR metric for speakers with CP. Conclusions & Implications: The main results, vowel space centralization for speakers with CP in comparison with TD peers, echo previous cross-linguistic results. The correlation of acoustic results with speech intelligibility carries clinical implications. Taken together, the results contribute to better characterization of the speech production deficit in Hebrew speakers with motor speech disorders. Furthermore, they may guide clinical decision-making and intervention planning to improve speech intelligibility.

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Section: Acoustic Findings and Implicationssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Section: Speech Intelligibility and Acoustic Measuresmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Acoustic vowel analysis and speech intelligibility in young adult Hebrew speakers: Developmental dysarthria versus typical development

Carl

Icht

2021

Intl J Lang & Comm Disor

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A Comprehensive Analysis of Age and Gender Effects in European Portuguese Oral Vowels

et al. 2023

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Perceptual and Acoustic Effects of Dual-Focus Speech Treatment in Children With Dysarthria

Levy

Chang

Hwang

et al. 2021

J Speech Lang Hear Res

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Purpose Children with dysarthria secondary to cerebral palsy may experience reduced speech intelligibility and diminished communicative participation. However, minimal research has been conducted examining the outcomes of behavioral speech treatments in this population. This study examined the effect of Speech Intelligibility Treatment (SIT), a dual-focus speech treatment targeting increased articulatory excursion and vocal intensity, on intelligibility of narrative speech, speech acoustics, and communicative participation in children with dysarthria. Method American English–speaking children with dysarthria ( n = 17) received SIT in a 3-week summer camplike setting at Columbia University. SIT follows motor-learning principles to train the child-friendly, dual-focus strategy, “Speak with your big mouth and strong voice.” Children produced a story narrative at baseline, immediate posttreatment (POST), and at 6-week follow-up (FUP). Outcomes were examined via blinded listener ratings of ease of understanding ( n = 108 adult listeners), acoustic analyses, and questionnaires focused on communicative participation. Results SIT resulted in significant increases in ease of understanding at POST, that were maintained at FUP. There were no significant changes to vocal intensity, speech rate, or vowel spectral characteristics, with the exception of an increase in second formant difference between vowels following SIT. Significantly enhanced communicative participation was evident at POST and FUP. Considerable variability in response to SIT was observed between children . Conclusions Dual-focus treatment shows promise for improving intelligibility and communicative participation in children with dysarthria, although responses to treatment vary considerably across children. Possible mechanisms underlying the intelligibility gains, enhanced communicative participation, and variability in treatment effects are discussed.

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Quantitative analysis of vowel production in cerebral palsy children with dysarthria

Cited by 12 publications

References 14 publications

Acoustic vowel analysis and speech intelligibility in young adult Hebrew speakers: Developmental dysarthria versus typical development

Acoustic vowel analysis and speech intelligibility in young adult Hebrew speakers: Developmental dysarthria versus typical development

A Comprehensive Analysis of Age and Gender Effects in European Portuguese Oral Vowels

Perceptual and Acoustic Effects of Dual-Focus Speech Treatment in Children With Dysarthria

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