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Computational reduction of the spectral division method for synthesizing moving sources by source trajectory
1NHK Science and Technology Research Laboratories, 1-10-11 Kinuta, Setagaya-ku, Tokyo 157-8510, Japan.
The Journal of the Acoustical Society of America
|February 2, 2023
Summary
This study introduces approximations to the spectral division method for synthesizing moving sound sources. The new approach significantly reduces computational cost by 50-100x without impacting sound field quality or localization.
Area of Science:
- Acoustics
- Signal Processing
- Computational Auditory Scene Analysis
Background:
- The spectral division method is computationally intensive for synthesizing moving sound sources.
- Accurate simulation of moving sound sources is crucial for applications like virtual reality and audio engineering.
Purpose of the Study:
- To develop a computationally efficient method for synthesizing moving sound sources.
- To reduce the computational cost of the spectral division method.
Main Methods:
- Approximation of the secondary source driving function.
- Approximation of the trajectory of moving sources.
- Simplification of integral calculations through frequency magnitude and phase correction.
Main Results:
- Computational cost reduced by a factor of 50-100 compared to conventional methods.
- Synthesized sound field quality remains largely unaffected.
- Sense of localization is preserved.
Conclusions:
- The proposed approximations offer a significant reduction in computational cost for synthesizing moving sound sources.
- The method provides a viable alternative for real-time audio processing and simulation.
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