RESUMO
Introducción y objetivos: La inadecuada retroalimentación auditiva en los niños con hipoacusia prelocutiva altera la articulación de consonantes y vocales. El propósito de esta investigación es comparar la producción de vocales en niños hipoacúsicos hispanohablantes con implante coclear o adaptación audioprotésica con niños normooyentes por medio del análisis acústico de las frecuencias formánticas y el espacio vocal. Método: Un total de 56 niños con hipoacusia prelocutiva (25 con implante coclear y 31 con audífonos) y 47 niños normooyentes participaron en el estudio. Los 2 primeros formantes (F1 y F2) de las 5 vocales del idioma español se midieron utilizando el programa Praat. Para analizar las diferencias entre los 3 grupos se aplicó el método ANOVA de análisis de la varianza y el test de Scheffé. También se calculó el área del espacio vocal. Resultados: El valor medio del F1 en todas las vocales no mostró diferencias significativas en los 3 grupos de niños. Para las vocales /i/, /o/ y /u/ el valor medio del F2 fue significativamente diferente entre los 2 grupos de niños hipoacúsicos y el grupo de niños normooyentes. Conclusión: Ambos grupos de niños con hipoacusia prelocutiva tienden a presentar sutiles desviaciones en la articulación de las vocales que pueden ser analizadas mediante un programa de análisis acústico
Introduction and objectives: Inadequate auditory feedback in prelingually deaf children alters the articulation of consonants and vowels. The purpose of this investigation was to compare vowel production in Spanish-speaking deaf children with cochlear implantation, and with hearing-aids with normal-hearing children by means of acoustic analysis of formant frequencies and vowel space. Methods: A total of 56 prelingually deaf children (25 with cochlear implants and 31 wearing hearing-aids) and 47 normal-hearing children participated. The first 2 formants (F1 and F2) of the five Spanish vowels were measured using Praat software. One-way analysis of variance (ANOVA) and post hoc Scheffé test were applied to analyze the differences between the 3 groups. The surface area of the vowel space was also calculated. Results: The mean value of F1 in all vowels was not significantly different between the 3 groups. For vowels /i/, /o/ and /u/, the mean value of F2 was significantly different between the 2 groups of deaf children and their normal-hearing peers. Conclusion: Both prelingually hearing-impaired groups tended toward subtle deviations in the articulation of vowels that could be analyzed using an objective acoustic analysis programme
Assuntos
Humanos , Masculino , Feminino , Pré-Escolar , Criança , Transtornos da Articulação/etiologia , Implantes Cocleares , Auxiliares de Audição , Perda Auditiva/complicações , Pessoas com Deficiência Auditiva , Fonética , Transtornos da Articulação/fisiopatologia , Retroalimentação Sensorial , Perda Auditiva/fisiopatologia , Perda Auditiva/reabilitação , Acústica da Fala , Medida da Produção da Fala , Qualidade da VozRESUMO
INTRODUCTION AND OBJECTIVES: Inadequate auditory feedback in prelingually deaf children alters the articulation of consonants and vowels. The purpose of this investigation was to compare vowel production in Spanish-speaking deaf children with cochlear implantation, and with hearing-aids with normal-hearing children by means of acoustic analysis of formant frequencies and vowel space. METHODS: A total of 56 prelingually deaf children (25 with cochlear implants and 31 wearing hearing-aids) and 47 normal-hearing children participated. The first 2 formants (F1 and F2) of the five Spanish vowels were measured using Praat software. One-way analysis of variance (ANOVA) and post hoc Scheffé test were applied to analyze the differences between the 3 groups. The surface area of the vowel space was also calculated. RESULTS: The mean value of F1 in all vowels was not significantly different between the 3 groups. For vowels /i/, /o/ and /u/, the mean value of F2 was significantly different between the 2 groups of deaf children and their normal-hearing peers. CONCLUSION: Both prelingually hearing-impaired groups tended toward subtle deviations in the articulation of vowels that could be analyzed using an objective acoustic analysis programme.
