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Spatial Encoding for Digital Waveguide Mesh Room Modeling Applications

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The Digital Waveguide Mesh (DWM) simulates Room Impulse Response (RIR) data for the purpose of capturing a modelled 2-D and 3-D sound-field. Two approaches to DWM spatial encoding techniques are discussed. The first is a circle of receivers used to provide a spatial reference as to the subsequent wavefronts incident on the boundary of the circle. In this way the capturing of the spatial information is similar to the underlying principle of Wavefield Synthesis (WFS). The second method is based on an approach to encode B-Format signals from real venues using several omnidirectional RIR recordings and has an underlying operation based on p-p sound measurement probes. Both encoding methods are compared using objective means to determine the success and accuracy of the reproduced soundfield.

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