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Minimum BRIR grid resolution for interactive position changes in dynamic binaural synthesis

This paper presents a psychoacoustic study on the minimum BRIR grid resolution required for a smooth transition in an interactive listener translation in virtual acoustic environments produced over headphones. A listening area with a size of 1m×2m was set up with a positional resolution of up to 5cm. 77490 BRIRs were simulated for this purpose. Two listening experiments were conducted to study the perception of discontinuities in the representation with various BRIR grid resolutions. Four different test signals were taken into account. The results show, that the required resolution depends on the signal. While for white noise, only the highest resolution (5cm) brought the best results, for sounds with limited bandwidth lower resolutions appeared to be just as ?ne.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=20788

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