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1.
CoDAS ; 28(5): 610-617, Sept.-Oct. 2016. tab, graf
Article Dans Portugais | LILACS | ID: biblio-828561

Résumé

RESUMO Objetivo Este trabalho apresenta as margens de tolerâncias mínimas e máximas para as frequências dos três primeiros formantes (F1, F2 e F3) na pronúncia das vogais orais do português brasileiro para utilização em terapias de voz para surdos. Método As frequências foram obtidas a partir da colaboração voluntária de 53 indivíduos adultos que tiveram as vozes gravadas e convertidas em sinais digitais durante a emissão de cada uma das sete vogais (/a/, /e/, /Ɛ/, /i/, /o/, /ᴐ/, /u/), de maneira sustentada por cerca de um segundo. As amostras foram distribuídas em dois grupos, um masculino e outro feminino. A gravação e a extração dos formantes foram efetuadas através de software próprio desenvolvido para este fim na plataforma MATLAB, utilizando o algoritmo LPC (Linear Predictive Coding) de oito coeficientes. Resultados Os resultados mostraram que uma referência consistente para os valores médios das frequências de F1, F2 e F3 pôde ser obtida através da análise gráfica e estatística das amostras de sinais de voz coletada. Conclusão Os valores de referência encontrados foram analisados e podem ser usados para calibração de dispositivos e podem servir de base para o treinamento de oralização para surdos.


ABSTRACT Purpose This study presents the margins of minimum and maximum tolerances for the frequencies of the first three formants (F1, F2, and F3) in the pronunciation of vowels of Brazilian Portuguese for use in voice therapy for the deaf. Methods The frequencies were obtained from the voluntary collaboration of 53 adults who had their voices recorded and converted into digital signals during the phonation of each of the seven vowels (/a/, /e/, /Ɛ/, /i/, /o/, /ᴐ/, /u/) sustained for approximately one second. The samples were divided into two groups: male and female. The recording and extraction of the formants were conducted by software developed exclusively for this purpose in MATLAB platform using the eight-coefficient LPC (Linear Predictive Coding) algorithm. Results The results showed that a consistent reference for the mean values of the F1, F2, and F3 frequencies can be obtained through graphical and statistical analysis of the samples collected from the voice signals. Conclusion The reference values obtained were analyzed and can be used for the calibration of devices and serve as a basis for training oralization for the deaf.


Sujets)
Humains , Mâle , Femelle , Adulte , Adulte d'âge moyen , Jeune adulte , Spectrographie sonore , Acoustique de la voix , Qualité de la voix , Traitement du signal assisté par ordinateur/instrumentation , Troubles de la voix/thérapie , Personnes malentendantes/rééducation et réadaptation , Phonation , Valeurs de référence , Éducation de la voix , Brésil , Ordinateurs , Langage , Adulte d'âge moyen
2.
Rev. chil. fonoaudiol. (En línea) ; 14: 92-102, nov.2015. tab
Article Dans Espagnol | LILACS | ID: lil-789942

Résumé

El presente estudio tuvo por objetivos describir las características acústicas de las vocales aisladas en jóvenes chilenos residentes en Santiago, comparar en ellos los resultados obtenidos para hombres y mujeres y también realizar una comparación con datos de hablantes en Río de la Plata (Argentina) y de Concepción (Chile). Se seleccionó una muestra de 117 estudiantes universitarios en quienes se descartó patología vocal y auditiva. Se registraron las voces de los sujetos produciendo las vocales aisladas y, posteriormente, se analizaron sus registros vocales con el software PRAAT. En general, en las comparaciones se advierte que en los sujetos de Santiago las mujeres presentan mayor frecuencia que los hombres en los formantes analizados(F0, F2, F3 y F4) excepto en F1. A su vez, las mujeres y hombres de Santiago evidencian una F0 mayor que sus pares rioplatenses, Por último, no se advierten diferencias importantes en la comparación con hablantes de Concepción. En cada comparación, se comentan también en forma detallada los formantes de cada una de las vocales...


The aim of this study was, firstly, to describe the acoustic characteristics of isolated vowels produced by Chilean young people from Santiago, Chile, secondly, to compare the results obtained between men and women and, finally, to compare the data with information collected from Argentinean speakers (Rio de la Plata) and Chilean speakers (Concepción). 117 university students were selected for this study. Neither vocal nor auditory pathologies were found in the participants. Vowels produced by the participants were registered in isolation and they were analyzed using the software PRAAT. In general, the comparison shows that women from Santiago produce higher frequency than men in the analyzed formants (F0, F2, F3 y F4), except in F1. It was also observed that women and men from Santiago show a higher F0formant than speakers from Rio de la Plata. Finally, no differences were found between speakers from Santiago and speakers from Concepción. In each comparison, a detailed description of the vowel formants is also presented...


Sujets)
Humains , Mâle , Adolescent , Adulte , Femelle , Jeune adulte , Phonétique , Acoustique de la voix , Vocabulaire , Chili , Facteurs sexuels
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