Toward a full-bandwidth numerical acoustic model

摘要: Prediction models are at the heart of modern acoustic engineering. Current commercial room simulation software almost exclusively approximates propagation sound geometrically as rays or beams. These assumptions yield efficient algorithms, but maximum accuracy they can achieve is limited by how well geometric assumption represents in a given space. This comprises their low frequencies particular. Methods that directly model wave effects more accurate have computational cost scales with problem size and frequency, effectively limiting them to small frequency scenarios. paper will report results initial research into new full-bandwidth which aims be for all frequencies; name proposed this "Wave Matching Method". builds on Boundary Element Method premise if an appropriate interpolation scheme designed then become 'geometrically dominated' high frequencies. Other modes may removed without significant error, yielding algorithm efficient. present general concepts matching from some numerical test cases.