The perception of sound distance has been sparsely studied so far. It is assumed to depend on familiar loudness, reverberation, sound spectrum, and parallax, but most of these factors have never been carefully addressed. Reverberation has been mostly analyzed in terms of ratio between direct and indirect sound, and total duration. Here we were interested in assessing the impact of each reflection order on distance localization. We compared sound source discrimination at an intermediate and at a distant location with direct sound only, one, two, three, and four reflection orders in a 2AFC task. At the intermediate distances, normalized psychophysical curves reveal no differentiation between direct sound and up to three reflection orders, but sounds with four reflection orders have significantly lower thresholds. For the distant sources, sounds with four reflection orders yielded the best discrimination slopes, but there was also a clear benefit for sounds with three reflection orders. We discuss the results in terms of direct-to-reflected ratio, reflection directionality, and spectral information.
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May 01 2013
Reflection orders and auditory distance
Catarina Mendonça;
Catarina Mendonça
Dept. of Signal Process. and Acoust., Aatlo Univ., Otakaari 5, Espoo FI-02150, Finlandmendonca.catarina@gmail.com
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João Lamas;
João Lamas
Centro Algoritmi, Univ. of Minho, Guimaraes, Portugal
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Tom Barker;
Tom Barker
Dept. of Signal Process., Tampere Univ. of Technol., Tampere, Finland
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Guilherme Campos;
Guilherme Campos
Departamento de Electrónica, Telecomunicações e Informática, Univ. of Aveiro, Aveiro, Portugal
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Paulo Dias;
Paulo Dias
Departamento de Electrónica, Telecomunicações e Informática, Univ. of Aveiro, Aveiro, Portugal
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Ville Pulkki;
Ville Pulkki
Dept. of Signal Process. and Acoust., Aatlo Univ., Espoo, Finland
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C. Silva;
C. Silva
Centro Algoritmi, Univ. of Minho, Guimarães, Portugal
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Jorge Santos
Jorge Santos
Centro Algoritmi, Univ. of Minho, Guimarães, Portugal
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J. Acoust. Soc. Am. 133, 3287 (2013)
Citation
Catarina Mendonça, João Lamas, Tom Barker, Guilherme Campos, Paulo Dias, Ville Pulkki, C. Silva, Jorge Santos; Reflection orders and auditory distance. J. Acoust. Soc. Am. 1 May 2013; 133 (5_Supplement): 3287. https://doi.org/10.1121/1.4805398
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