Baulärm war früher Krach, heute ist er Wachstumsmusik.

Alfred Biolek
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English

ICSA 2015

3rd International Conference on Spatial Audio

Graz, September 18 - 20, 2015

 

Abstract

 Perceptual Aspects of Dynamic Binaural Synthesis based on measured Omnidirectional Room Impulse Responses
(Propose Talk)

The auralization of acoustic environments based on dynamic binaural synthesis can be used for a variety of applications. Sets of rotated high-resolution binaural room impulse response (BRIR) are often acquired by performing measurements with rotating dummy heads. This procedure is rather costly and therefore not always feasible in practice.
Recently, at the German DAGA 2015 conference, an approach for synthesizing rotated BRIR sets based from a single omni-directional room impulse response (RIR) was presented. Direct sound, early reflections and diffuse reverberation are extracted from the latter and treated separately. Spatial information is added according to generic geometric assumptions and exploiting certain psychoacoustic effects e.g. concerning the perceptual mixing time.
While the highest goal in auralization is achieving authentic reproduction of a sound scene, i.e. the recipient cannot distinguish a technically represented sound scene from an equivalent real sound scene, a sufficiently plausible representation is actually adequate for many practical applications, which is the basic assumption for the presented approach. Naturally, there are certain physical and perceptual differences between actual measured BRIRs and synthesized BRIRs based on a single omni-directional RIR. The perceptual differences were evaluated in a listening test based on a SAQI test paradigm (Lindau et al., 2014) for four rooms with different room acoustic properties. The results are presented and discussed in the scope of this contribution.

Christoph Pörschmann
(Technische Hochschule Köln)


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