Direct-to-indirect acoustic radiance transfer

Area of Science:

• Acoustics
• Computer Graphics
• Signal Processing

Background:

• Simulating diffuse sound reflections is crucial for realistic audio rendering in virtual environments.
• Existing acoustic radiance transfer methods can be computationally expensive, especially for dynamic scenes.

Purpose of the Study:

• To develop an efficient algorithm for simulating diffuse sound reflections in static scenes.
• To improve upon existing acoustic radiance transfer techniques by leveraging precomputed light transport methods.

Main Methods:

• Adapted precomputed light transport techniques from visual rendering for acoustic simulations.
• Developed a direct-to-indirect acoustic transfer operator that is precomputed for a scene.
• Decoupled the transfer operator from the sound source position for efficient updates.

Main Results:

• The algorithm efficiently maps direct sound to multibounce diffuse indirect sound.
• Achieved significant speedups compared to prior acoustic radiance transfer methods.
• Demonstrated effective performance on various benchmarks.

Conclusions:

• The proposed method offers an efficient and faster approach to simulating diffuse sound reflections.
• The decoupling of the transfer operator allows for real-time updates of acoustic responses to source movement.
• This technique advances the state-of-the-art in acoustic simulation for static scenes.