Article

Computationally-efficient Simulation of Diffuse Late Reverberation in Conditions with Occluded and Diffracted Sound Paths (online)

* Presenting author
Day / Time: 24.03.2022, 15:00-15:20
Room: 47-05
Typ: Vortrag (strukturierte Sitzung)
Online-access: Bitte loggen Sie sich ein, damit weitere Inhalte sichtbar werden (bspw. der Zugang zur Onlinesitzung).
Abstract:

Creating virtual acoustics environments at a low computational cost is often approached by hybrid techniques, which combine the rendering of discrete early reflections and diffuse late reverberation generated based on statistical assumptions. For the combination of early reflections generated by an image source model (ISM) and a feedback delay network for late reverberation, this transition can be straightforwardly implemented for a shoebox model assuming specular reflections. When the underlying geometry of the ISM is more complex, occluded sound and image sources with diffracted (reflection) paths can occur, resulting in spectrally filtered contributions to the room impulse response, depending on the given geometric configuration. However, simulation of diffuse late reverberation should consider the contribution of diffracted sound energy outside the diffracted geometric (reflection) path.In this work, spectral effects of the introduction of differently sized occluding objects are investigated in the early and late part of measured room impulse responses at several positions in a room. Results are discussed in the context of a computationally-efficient room acoustics simulation and are compared to room impulse responses generated by different approximations implemented in the room acoustics simulator RAZR [Wendt et al., J. Audio Eng. Soc., 62, 11 (2014)].

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