Browsing by Author "Vilarinho, Helena"
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- The influence of occlusal class in the production of voiceless fricativesPublication . Araújo, André; Vilarinho, Helena; Jesus, Luís M. T.The aim of this study was to relate the production of voiceless fricatives with the type of dental occlusion. The articulatory gestures during the production of consonant sounds such as the voiceless fricatives /f/, /s/ and /ʃ/, seem to be disturbed for type II class (Angle’s classification) individuals, which frequently require the training of compensatory articulation to get a “normal” acoustic output. This work is central to the first two authors’ clinical practice in Speech and Language Therapy in which it is frequent the need to treat articulatory disorders.
- Voice parameters in children with Down syndromePublication . Moura, Carla Pinto; Cunha, Luís Miguel; Vilarinho, Helena; Cunha, Maria João; Freitas, Diamantino; Palha, Miguel; Pueschel, Siegfried M.; Pais-Clemente, M.; Gonçalves, Maria João MoreiraDown syndrome (DS) is the most frequent chromosomal disorder. Commonly, individuals with DS have difficulties with speech and show an unusual quality in the voice. Their phenotypic characteristics include general hypotonia and maxillary hypoplasia with relative macroglossia, and these contribute to particular acoustic alterations. Subjective perceptual and acoustic assessments of the voice (Praat-4.1 software) were performed in 66 children with DS, 36 boys and 30 girls, aged 3 to 8 years. These data were compared with those of an age-matched group of children from the general population. Perceptual evaluations showed significant differences in the group of children with DS. The voice of children with DS presented a lower fundamental frequency (F0) with elevated dispersion. The conjunction of frequencies for formants (F1 and F2) revealed a decreased distinction between the vowels, reflecting the loss of articulatory processing. The DS vocalic anatomical functional ratio represents the main distinctive parameter between the two groups studied, and it may be useful in conducting assessments.