Wave-based sound propagation in large open scenes using an equivalent source formulation
Abstract
We present a novel 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 computed analytically to yield 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 for 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 2013
- Source ID
- 10.1145/2451236.2451245
Entities
People
- Anish Chandak
- Dinesh Manocha
- Lakulish Antani
- Nikunj Raghuvanshi
- Ravish Mehra
- Sean Curtis
Organizations
- Army Research Office
- Microsoft
- National Science Foundation
- University of North Carolina at Chapel Hill