Sampling and Reconstruction on a Diamond Grid and the Tetrahedral Digital Waveguide Mesh

Hamilton, Brian

doi:10.1109/lsp.2013.2273175

Cited by 1 publication

(1 citation statement)

References 13 publications

(51 reference statements)

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“…Like the SDN, a WGW is a network of discrete nodes, including, source, receiver and a number of reflection points, which can be, for example, trees or other reflective surfaces. The WGW differs distinctly from the digital waveguide mesh, which is a regular grid structure of scattering nodes and interconnections, used for modeling multidimensional wave propagation, also usually in closed systems [35]- [38]. This paper shows that the proposed WGW has similarities to, but is also different from, the recently introduced scattering delay network (SDN) approach to reverberation design as it extends the design of the SDN to incorporate directionally-dependent filtering at the node positions.…”

Section: Introductionmentioning

confidence: 98%

Modeling Sparsely Reflecting Outdoor Acoustic Scenes Using the Waveguide Web

Stevens

Murphy

Savioja

et al. 2017

IEEE/ACM Trans. Audio Speech Lang. Process.

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Computer games and virtual reality require digital reverberation algorithms, which can simulate a broad range of acoustic spaces, including locations in the open air. Additionally, the detailed simulation of environmental sound is an area of significant interest due to the propagation of noise pollution over distances and its related impact on well-being, particularly in urban spaces. This paper introduces the waveguide web digital reverberator design for modeling the acoustics of sparsely reflecting outdoor environments; a design that is, in part, an extension of the scattering delay network reverberator. The design of the algorithm is based on a set of digital waveguides connected by scattering junctions at nodes that represent the reflection points of the environment under study. The structure of the proposed reverberator allows for accurate reproduction of reflections between discrete reflection points. Approximation errors are caused when the assumption of point-like nodes does not hold true. Three example cases are presented comparing waveguide web simulated impulse responses for a traditional shoebox room, a forest scenario, and an urban courtyard, with impulse responses created using other simulation methods or from real-world measurements. The waveguide web algorithm can better enable the acoustic simulation of outdoor spaces and so contribute toward sound design for virtual reality applications, gaming, and auralization, with a particular focus on acoustic design for the urban environment.

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Section: Introductionmentioning

confidence: 98%