Range and Precision of Formant Movement in Pediatric Dysarthria

Allison, Kristen M.; Annear, Lucas; Policicchio, Marisa; Hustad, Katherine C.

doi:10.1044/2017_jslhr-s-15-0438

Cited by 20 publications

(15 citation statements)

References 42 publications

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“…A study (28) found smaller vowel spaces in children with cerebral palsy compared to children with typical development in both the word and phrase contexts. However, variations of the second formant did not differ between groups for word or phrase contexts, but presented smaller values in simple words, with phonetic contexts requiring large changes in vocal tract configuration.…”

Section: Discussionmentioning

confidence: 95%

Configuração acústico-articulatória das vogais de mulheres com nódulos vocais e vocalmente saudáveis

França

Almeida

Lopes

2019

CoDAS

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RESUMO Objetivo Analisar a configuração acústico-articulatória das vogais em mulheres com nódulos vocais e vocalmente saudáveis. Método Participaram do estudo 12 mulheres com nódulos vocais (GE) e 12 vocalmente saudáveis (GC). Todas as mulheres gravaram frases-veículo com as vogais /a/, /i/ e /u/ em posição tônica, sucedidas e precedidas da oclusiva /p/: “Digo papa baixinho”, “Digo pipa baixinho” e “Digo pupa baixinho”. Posteriormente, foram extraídos os três primeiros formantes (F1, F2 e F3) dessas vogais. Resultados Observou-se diferença nas medidas de F1 para as vogais /a/ e /u/ e F2 para a vogal /a/ entre os dois grupos estudados. Mulheres com nódulos vocais apresentam menor valor dessas medidas em relação às mulheres vocalmente saudáveis. Pacientes com nódulos vocais apresentaram menor intervalo nos valores de F1 e F2 entre as vogais /a/, /i/ e /u/ em relação às mulheres vocalmente saudáveis. Conclusão Mulheres com nódulos vocais apresentam menores valores de F1 e F2, e menor amplitude de movimentação dos articuladores na produção vocálica em relação às mulheres vocalmente saudáveis.

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Section: Discussionmentioning

confidence: 95%

Configuração acústico-articulatória das vogais de mulheres com nódulos vocais e vocalmente saudáveis

França

Almeida

Lopes

2019

CoDAS

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“…Furthermore, from a developmental perspective, speech sounds requiring jaw movements are acquired earliest due to their reduced complexity and reduced degrees of freedom of movement (Green et al 2000). It should be noted that results of Allison et al (2017) bring evidence against the notion of consistently reduced range of articulatory targets among children with CP. Instead, the authors indicate that impaired acoustic measures may be attributed to imprecision and impaired coordination of speech movements.…”

Section: Vfdmentioning

confidence: 99%

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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“…These utterance-level intelligibility scores were averaged across utterances of the same length to obtain an intelligibility score for single words and sentences of each length for each listener (e.g., intelligibility scores of all two-word sentences from the TOCS+ were averaged to obtain a mean two-word intelligibility score). For each child, overall intelligibility was determined by averaging the single word and sentence intelligibility scores for each listener and then calculating the mean overall intelligibility scores across the five listeners, consistent with procedures used in prior publications (Allison, Annear, Policicchio, & Hustad, 2017;Allison & Hustad, 2018;Hustad et al, 2010;Hustad, Oakes, McFadd, & Allison, 2016).…”

Section: Childmentioning

confidence: 99%

Data-Driven Classification of Dysarthria Profiles in Children With Cerebral Palsy

Allison

Hustad

2018

J Speech Lang Hear Res

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Purpose The objectives of this study were to examine different speech profiles among children with dysarthria secondary to cerebral palsy (CP) and to characterize the effect of different speech profiles on intelligibility. Method Twenty 5-year-old children with dysarthria secondary to CP and 20 typically developing children were included in this study. Six acoustic and perceptual speech measures were selected to quantify a range of segmental and suprasegmental speech characteristics and were measured from children's sentence productions. Hierarchical cluster analysis was used to identify naturally occurring subgroups of children who had similar profiles of speech features. Results Results revealed 4 naturally occurring speech clusters among children: 1 cluster of children with typical development and 3 clusters of children with dysarthria secondary to CP. Two of the 3 dysarthria clusters had statistically equivalent intelligibility levels but significantly differed in articulation rate and degree of hypernasality. Conclusion This study provides initial evidence that different speech profiles exist among 5-year-old children with dysarthria secondary to CP, even among children with similar intelligibility levels, suggesting the potential for developing a pediatric dysarthria classification system that could be used to stratify children with dysarthria into meaningful subgroups for studying speech motor development and efficacy of interventions.

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Range and Precision of Formant Movement in Pediatric Dysarthria

Cited by 20 publications

References 42 publications

Configuração acústico-articulatória das vogais de mulheres com nódulos vocais e vocalmente saudáveis

Configuração acústico-articulatória das vogais de mulheres com nódulos vocais e vocalmente saudáveis

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

Data-Driven Classification of Dysarthria Profiles in Children With Cerebral Palsy

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