A importância das variações espectrais transferidas anatomicamente para a localização de fontes sonoras
Head related transfer function relevance to sound source localization
Aline Cabral de Oliveira; Leónidas da Silva Morais Netto; Luciana Pinto Rocha; Vivian Passos Lima; Pedro de Lemos Menezes
Resumo
Objetivo: correlacionar o percentual de acertos na localização sonora com o comprimento e largura da cabeça e dos ombros e observar a diferença entre as diversas freqüências sonoras apresentadas e os planos espaciais estudados.
Métodos: a amostra foi composta por 52 indivíduos, 20 homens e 32 mulheres, que foram submetidos à meatoscopia, audiometria tonal e EOAs. Foram realizadas também as medidas relativas ao comprimento e largura da cabeça e ombros. Posteriormente, os indivíduos foram submetidos ao teste de localização sonora, nos planos horizontal e vertical, e com as freqüências de 0,5, 2 e 4 kHz.
Resultados: correlação significativa (p<0,05) foi obtida apenas entre a largura dos ombros e os acertos no plano horizontal, utilizando-se as freqüências de 2 e 4 kHz.
Conclusão: o percentual de acertos na localização sonora aumenta com o aumento do comprimento dos ombros utilizando-se as freqüências de 2 e 4 kHz, no plano horizontal.
Palavras-chave
Abstract
Purpose: to investigate the relevance of the head transfer function related to the sound localization by human normal hearing, in reverberant environment; to correlate the percentage of success in sound localization and the length and the width of the head and the shoulders, observing the difference among frequencies and the spatial planes.
Methods: the sample was made up by 52 individuals, 20 men and 32 women, which had been submitted to otoscopy, tonal audiometry and OAE. The measures related to length and width of the head and shoulders had been carried out too. Later, the individuals had been submitted to sound localization test, in the horizontal and vertical planes, and with the frequencies of 0.5, 2 and 4 kHz.
Results: significant correlation was obtained (p<0.05) just between the width of the shoulders and the success in the horizontal plane, using 2 and 4 kHz.
Conclusion: The percentage of success in the sound localization increases with the increase in the length of the shoulders using 2 and 4 kHz, in the horizontal plane.
Keywords
Referências
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Submetido em:
22/06/2007
Aceito em:
28/05/2008
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