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A beam tracing method for interactive architectural acoustics.

Thomas Funkhouser1, Nicolas Tsingos, Ingrid Carlbom

  • 1Princeton University, Princeton, New Jersey 08540, USA. funk@cs.princeton.edu

The Journal of the Acoustical Society of America
|March 6, 2004
PubMed
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This study introduces a beam tracing method for fast acoustic propagation path calculations in large buildings. It enables interactive updates for sound design and virtual walkthroughs.

Area of Science:

  • Computational acoustics
  • Geometric acoustics modeling

Background:

  • Computing sound propagation paths is computationally intensive for real-time applications.
  • Existing methods struggle with interactive updates in complex environments.

Purpose of the Study:

  • To develop an efficient beam tracing method for interactive acoustic modeling.
  • To enable real-time updates of sound propagation paths in large building interiors.

Main Methods:

  • A precomputation phase stores sound beams in a 'beam tree' from source locations.
  • The beam tree represents reachable space via transmissions, diffractions, and reflections.
  • An interactive phase uses the beam tree to generate paths for moving receivers.

Main Results:

Related Experiment Videos

  • The method scales to large building environments.
  • It accurately models edge diffraction and finds all relevant paths.
  • Propagation path updates occur at interactive rates.

Conclusions:

  • The beam tracing method significantly improves interactive acoustic design.
  • It is effective for real-time applications like virtual walkthroughs.
  • This approach addresses the challenge of fast acoustic path computation.