modificações vocais acústicas espectrográficas produzidas pela fonação reversa spectrography acoustic vocal modifications produced by reverse phonation

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ID: 155634
2010
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Abstract
OBJETIVO: conhecer os efeitos da técnica de fonação reversa, realizando análise da sua eficácia sobre vozes femininas normais, por meio da espectrografia acústica de banda larga e de banda estreita. MÉTODOS: 32 mulheres adultas jovens, que assinaram o Termo de Consentimento Livre e Esclarecido da pesquisa, submeteram-se à avaliação otorrinolaringológica e triagem fonoaudiológica a fim de eliminar possíveis alterações que pudessem interferir nos resultados da pesquisa. Tiveram amostras vocais coletadas antes e após realizar três séries de 15 repetições de fonação reversa em tempo máximo de fonação com tom e intensidade habituais, com 30 segundos de repouso passivo entre cada série. Utilizou-se o software Real Time Spectrogram (Kay Elemetrics Corp.) para gerar espectrogramas de banda larga e de banda estreita. Os dados obtidos foram analisados por meio de porcentagem simples e do teste do Qui-Quadrado, com nível de significância de 5%. RESULTADOS: houve tendência percentual ao aumento da definição de harmônicos, da regularidade do traçado, da intensidade e da definição dos Formantes 3 e 4, da intensidade das altas frequências e em todo o espectro; e aumento significante da definição do Formante 1. CONCLUSÃO: acredita-se que a técnica favoreça o alongamento e a vibração das pregas vocais com possível homogeneização e modificações ocorridas na mucosa, e conseqüente melhoria do sinal vocal, com maior regularidade de vibração e melhora de ressonância.
PURPOSE: to improve knowledge on the effects of reverse phonation technique based on an analysis of its efficiency on normal female voice, using wideband and narrowband spectrograph. METHODS: 32 young adult women who signed the Informed Consent were submitted to otorhinolaryngologic evaluation and speech and hearing screening in order to avoid alterations that could interfere in the results of the study; voice samples were collected before and after three series containing 15 reverse phonation repetitions, at maximum phonation time with habitual tone and intensity, and 30-seconds interval of passive rest between the series. We used the Real Time Spectrogram software (Kay Elemetrics Corp.) to generate wideband and narrowband spectrograph. Data were analyzed by means of the simple percentage and the Qui-Square test, with a significance level of 5%. RESULTS: there was a trend to increase in the definition of harmonics; an increase in the regularity the spectrograph; in the intensity and definition of Formants 3 and 4 frequencies; in the intensity of high frequencies and in the entire spectrum; as well as a significant increase in the definition of Formant 1. CONCLUSION: finally, we believe that the technique enables the stretching and vibration of the vocal folds, with a possible homogenization and modifications in the mucous, consequently improving the vocal signal with a higher vibration regularity and an improvement in resonance.
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zimmer2010revistamodificaes Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Valquíria Zimmer;Carla Aparecida Cielo;Leila Susana Finger
Journal journal of applied botany and food quality
Year 2010
DOI
DOI not found
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-18462010000400002
Keywords
voice quality speech therapy voice voz linguisticsotorhinolaryngology voice trainingphilology

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