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Original Article

Brazilian Portuguese Speech Material and its Application in Occupational Audiology: Material vocal en portugues brasileno y su aplicacion en Audiologia Ocupacional

Pages 123-132 | Received 05 Feb 2001, Published online: 07 Jul 2009
 

Abstract

Brazilian Portuguese speech test material consisting of nine monosyllabic 25-word lists was developed and digitally recorded on one channel of a compact disk with a speech-weighted modulated broadband noise on the other channel. Speech recognition functions in quiet and in noise, with word and phoneme scores, were obtained, and normative speech recognition data were standardized by determination of the psychometric function in 21 normally-hearing volunteers in quiet, and in 30 normally-hearing subjects in noise. The homogeneity of the nine lists was investigated in phoneme recognition data with 30 normally-hearing subjects. Speech recognition functions in quiet and in noise, with word and phoneme scores, were obtained in 65 noise-exposed workers. These results were very close to normative data, when tested in quiet, but significantly worse when tested in noise. It is concluded that the speech test material can be useful for estimating the communication performance of noise-exposed workers.

El material vocal en portugués brasileño que consta de 9 listas de 25 monosílabos fue grabado en un canal de un disco compacto con ruido vocal modulado de banda estrecha en el otro. Se obtuvieron las funciones de reconocimiento de habla en ruido y en silencio con calificaciones para fonemas y palabras; así mismo se estandarizaron los datos normativos de reconocimiento del habla mediante psicometría en 21 voluntarios normo-yentes, en silencio y 30 normoyentes en ambiente ruidoso. La homogeneidad de las 9 listas se probó eon el reconocimiento fonémico en 30 normoyentes. Se obtuvo el reconocimiento del habla en ruido y en silencio con palabras y con fonemas en 65 trabajadores expuestos a ruido. Estos resultados son muy cercanos a los datos normativos cuando se realizaron en silencio, pero significativamente peores cuando la prueba se hizo en ambiente ruidoso. Se concluye que el material vocal puede ser til para determinar el desempefio comunicativo de los trabajadores expuestos a ruido.

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