The University of North Carolina at Chapel Hill

Ravish Mehra

Dinesh Manocha

Jan-Michael Frahm

Lakulish Shailesh Antani

Carl Henry Schissler

Enrique Dunn

Alok Namdeo Meshram

Hongsheng Yang

Nicolas Manuel Morales

Methods, systems, and computer readable media for simulating sound propagation are disclosed. According to one method, the method includes decomposing a virtual environment scene including at least one object into a plurality of surface regions, wherein each of the surface regions includes a plurality of surface patches. The method further includes organizing sound rays generated by a sound source in the virtual environment scene into a plurality of path tracing groups, wherein each of the path tracing groups comprises a group of the rays that traverses a sequence of surface patches. The method also includes determining, for each of the path tracing groups, a sound intensity by combining a sound intensity computed for a current time with one or more previously computed sound intensities respectively associated with previous times and generating a simulated output sound at a listener position using the determined sound intensities.

Methods, systems, and computer readable media for modeling interactive diffuse reflections and higher-order diffraction in virtual environment scenes

Methods, systems, and computer readable media for utilizing adaptive rectangular decomposition (ARD) to perform head-related transfer function (HRTF) simulations are disclosed herein. According to one method, the method includes obtaining a mesh model representative of head and ear geometry of a listener entity and segmenting a simulation domain of the mesh model into a plurality of partitions. The method further includes conducting an ARD simulation on the plurality of partitions to generate simulated sound pressure signals within each of the plurality of partitions and processing the simulated sound pressure signals to generate at least one HRTF that is customized for the listener entity.

Methods, systems, and computer readable media for utilizing adaptive rectangular decomposition (ARD) to generate head-related transfer functions

Methods, systems, and computer readable media for utilizing parallel adaptive rectangular decomposition (ARD) to perform acoustic simulations are disclosed herein. According to one method, the method includes assigning, to each of a plurality of processors in a central processing unit (CPU) cluster, ARD processing responsibilities associated with one or more of a plurality of partitions of an acoustic space and determining, by each processor, pressure field data corresponding to the one or more assigned partitions. The method further includes transferring, by each processor, the pressure field data to at least one remote processor that is assigned to a partition that shares an interface with at least one partition assigned to the transferring processor and receiving, by each processor from the at least one remote processor, forcing term values that have been derived by the at least one remote processor using the pressure field data.

Methods, systems, and computer readable media for utilizing parallel adaptive rectangular decomposition (ARD) to perform acoustic simulations

The subject matter described herein includes an approach for wave-based sound propagation suitable for large, open spaces spanning hundreds of meters, with a small memory footprint. The scene is decomposed into disjoint rigid objects. The free-field acoustic behavior of each object is captured by a compact per-object transfer-function relating the amplitudes of a set of incoming equivalent sources to outgoing equivalent sources. Pairwise acoustic interactions between objects are cornuted analytically, yielding compact inter-object transfer functions. The global sound field accounting for all orders of interaction is computed using these transfer functions. The runtime system uses fast summation over the outgoing equivalent source amplitudes for all objects to auralize the sound field at a moving listener in real-time. We demonstrate realistic acoustic effects such as diffraction, low-passed sound behind obstructions, focusing, scattering, high-order reflections, and echoes, on a variety of scenes.

Methods, systems, and computer readable media for simulating sound propagation in large scenes using equivalent sources

Methods, systems, and computer readable media for supporting source or listener directivity in a wave-based sound propagation model are disclosed. According to one method, the method includes computing, prior to run-time, one or more sound fields associated with a source or listener position and modeling, at run-time and using the one or more sound fields and a wave-based sound propagation model, source or listener directivity in an environment.

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Chapel Hill, NC, United States of America

Ravish Mehra