Abstract
Artificial reverberators provide a computationally viable alternative to full-scale room acoustics simulation methods for deployment in interactive, immersive systems. Scattering delay network (SDN) is an artificial reverberator that allows direct parametric control over the geometry of a simulated cuboid enclosure, as well as the directional characteristics of the simulated sound sources and microphones. This paper extends the concept of SDN reverberators to multiple enclosures coupled via an aperture. The extension allows independent control of the acoustical properties of the coupled enclosures and the size of the connecting aperture. Transfer functions of the coupled-volume SDN are derived. The effectiveness of the proposed method is evaluated in terms of rendered energy decay curves in comparison to full-scale ray-tracing models and scale model measurements.
Highlights
A number of room acoustic models have been proposed over the past six decades [1], [2]
We propose the coupled-volume Scattering delay network (SDN) (CVSDN) as an extension to the original SDN concept that allows the simulation of the acoustics of coupled volumes and a parametric control of the size of the aperture between them
We present an objective evaluation of the Coupled-Volume SDN (CV-SDN) reverberators in comparison with room acoustics simulation using ODEON, a state-of-the-art ray tracing based geometric room acoustics simulator, as well as measurements made using a scale model
Summary
A number of room acoustic models have been proposed over the past six decades [1], [2]. Relevant in the context of this paper is the work of Das and Abel [23], who recently modified FDNs to model coupled volumes. SDN was shown to provide levels of naturalness and pleasantness that are comparable to full-scale room acoustic simulators [29]. These properties make it suitable for immersive interactive applications, as explored recently in the context of augmented reality [30]–[33].
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