Achados espectrais das vogais [a] e [ã] em diferentes aberturas velofaríngeas

Lima-Gregio, Aveliny Mantovan; Dutka, Jeniffer de Cássia Rillo; Marino, Viviane Cristina de Castro; Pegoraro‐Krook, Maria Inês; Barbosa, Plínio Almeida

doi:10.1590/s0104-56872010000400026

Cited by 2 publications

(2 citation statements)

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“…This calls for careful interpretation of these findings. The mean nasalance obtained when no speech bulb was in place (53%) was lower than the means found for the 2 conditions with experimental opening (55% and 56%), which can be interpreted as suggestive of the possibility of active physiologic adjustments, such as reported by 10,12,16 . As the later authors described respiratory, laryngeal, and supralaryngeal physiological adjustments may take place as the conditions within the speech system changes.…”

Section: Discussionmentioning

confidence: 58%

“…to compensate for air loss), the findings following a sustained perturbation (observed after the subject used the obturator with the "fistula" for five days) suggested that with time, other physiological adjustments may help reestablish the requirements to balance air pressure and resonance. Lima-Gregio and colleagues 10 (2010) investigated frequency spectral aspects of vowels [a] and [ɐ̃] at different velopharyngeal openings (10 mm 2 , 20 mm 2 and 30 mm 2 ). Their findings revealed that at the presence of the larger openings (20 mm 2 and 30 mm 2 ) the F2 values obtained for the oral vowel [a] were similar to the values obtained for the nasal vowel [ɐ̃], which the authors interpreted as indicative of tongue adjustments (posteriorization).…”

Section: Introductionmentioning

confidence: 99%

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Nasalance and nasality at experimental velopharyngeal openings in palatal prosthesis: a case study

et al. 2011

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The use of prosthetic devices for correction of velopharyngeal insufficiency (VPI) is an alternative treatment for patients with conditions that preclude surgery and for those individuals with a hypofunctional velopharynx (HV) with a poor prognosis for the surgical repair of VPI. Understanding the role and measuring the outcome of prosthetic treatment of velopharyngeal dysfunction requires the use of tools that allow for documenting pre- and post-treatment outcomes. Experimental openings in speech bulbs have been used for simulating VPI in studies documenting changes in aerodynamic, acoustic and kinematics aspects of speech associated with the use of palatal prosthetic devices. The use of nasometry to document changes in speech associated with experimental openings in speech bulbs, however, has not been described in the literature.ObjectiveThis single-subject study investigated nasalance and nasality at the presence of experimental openings drilled through the speech bulb of a patient with HV. Material and MethodsNasometric recordings of the word "pato" were obtained under 4 velopharyngeal conditions: no-opening (control condition), no speech bulb, speech bulb with a 20 mm2 opening, and speech bulb with 30 mm2 opening. Five speech-language pathologists performed auditory-perceptual ratings while the subject read an oral passage under all conditions. ResultsKruskal-Wallis test showed significant difference among conditions (p=0.0002), with Scheffé post hoc test indicating difference from the no-opening condition.ConclusionThe changes in nasalance observed after drilling holes of known sizes in a speech bulb suggest that nasometry reflect changes in transfer of sound energy related to different sizes of velopharyngeal opening.

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Section: Discussionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Nasalance and nasality at experimental velopharyngeal openings in palatal prosthesis: a case study

et al. 2011

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Estudo eletropalatográfico de fones nasais em indivíduo com fissura labiopalatina

Jesus

Reis

2013

Rev. CEFAC

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Esse estudo tem como objetivo descrever o padrão de contato entre a língua e o palato para um falante com fissura labiopalatina, na produção de fones consonantais nasais do português comparando-o a um falante sem alterações articulatórias. Por meio da eletropalatografia, são examinados os fones consonantais nasais [m], [n], [ɲ] no ponto de máxima constrição, verificando a região articulatória dessa constrição, por meio dos palatogramas fornecidos pelo programa de análise. Tais dados foram obtidos de um falante com alterações de fala em decorrência da fissura labiopalatina e de outro sem tais alterações, para efeito de comparação. Todos os fones analisados, produzidos pelo falante com fissura, mostraram variações quanto à região articulatória em que ocorreu a constrição, em relação ao falante normal. No fone [m] ocorreu simultaneamente oclusão labial e lingual, com amplo contato, quando o que se espera é coprodução com a vogal que se segue; no fone [n] houve recuo da língua, com constrição na região palatal; e no fone [ɲ] a constrição ocorreu em uma região mais anteriorizada, em relação ao falante normal, isto é, com avanço da língua. Tais produções consonantais eram percebidas auditivamente como distorções, mas não havia uma caracterização clara dos ajustes articulatórios usados na sua produção. Os fones nasais podem apresentar-se alterados na fala de indivíduo com fissura palatina, sendo a eletropalatografia um recurso tecnológico que possibilita a observações detalhada dessas alterações na fala.

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Achados espectrais das vogais [a] e [ã] em diferentes aberturas velofaríngeas

Abstract: Significant changes were observed in the studied spectral values according to changes in the velopharyngeal opening size.

Cited by 2 publications

References 18 publications

Nasalance and nasality at experimental velopharyngeal openings in palatal prosthesis: a case study

Nasalance and nasality at experimental velopharyngeal openings in palatal prosthesis: a case study

Estudo eletropalatográfico de fones nasais em indivíduo com fissura labiopalatina

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