Topological Sound Propagation with Reverberation Graphs
Reverberation graphs is a novel approach to estimate global sound-pressure decay and auralize corresponding reverberation effects in interactive virtual environments. We use a 3D model to represent the geometry of the environment explicitly, and we subdivide it into a series
of coupled spaces connected by portals. Off-line geometricalacoustics techniques are used to precompute transport operators, which encode pressure decay characteristics within each space and between coupling interfaces. At run-time, during an interactive simulation, we traverse the
adjacency graph corresponding to the spatial subdivision of the environment. We combine transport operators along different sound propagation routes to estimate the pressure decay envelopes from sources to the listener. Our approach compares well with off-line geometrical techniques, but computes
reverberation decay envelopes at interactive rates, ranging from 12 to 100 Hz. We propose a scalable artificial reverberator that uses these decay envelopes to auralize reverberation effects, including room coupling. Our complete system can render as many as 30 simultaneous sources in large
dynamic virtual environments.
Document Type: Research Article
Publication date: 01 November 2008
- Access Key
- Free content
- Partial Free content
- New content
- Open access content
- Partial Open access content
- Subscribed content
- Partial Subscribed content
- Free trial content