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3D Beam Tracing Based on Visibility Lookup for Interactive Acoustic Modeling.
IEEE Transactions on Visualization and Computer Graphics
|January 14, 2016
Summary
This study introduces a faster method for calculating reflections in 3D spaces using acoustic beam tracing. The technique significantly speeds up computation for real-time applications with moving sound sources and receivers.
Area of Science:
- Acoustics
- Computational Geometry
- Computer Graphics
Background:
- Calculating specular reflections in complex 3D environments is computationally intensive.
- Existing methods struggle with real-time performance, especially for dynamic scenes.
Purpose of the Study:
- To develop an efficient method for accelerating the computation of specular reflections in 3D enclosures.
- To enable real-time acoustic simulations with moving sources and receivers.
Main Methods:
- Acoustic beam tracing utilizing a precomputed visibility data structure.
- Encoding region-to-region visibility using Plücker coordinates for acoustic rays.
- Iterative lookup and traversal of the visibility data structure during beam tracing.
Main Results:
- The proposed method constructs beam trees efficiently through an iterative lookup process.
- Plücker parameterization simplifies visibility evaluation, reducing computational load.
- Achieved average computation time per beam in the order of microseconds.
Conclusions:
- The method provides a significant acceleration for specular reflection computation.
- Suitable for interactive applications involving dynamic acoustic environments.
- Offers a computationally efficient approach for complex 3D acoustic simulations.
