| Popis: |
Beam tracing and ray tracing are well established acoustic simulation methods, based on geometric acoustics. Beam tracing offers the precision of the simulation at the cost of the computational complexity, while ray tracing excels with the performance and the flexibility but suffers from potential aliasing and non- detection errors. In this paper, we present the hybrid beam/ray tracing simulation method, that uses beam tracing for the first part of the room impulse response, and ray tracing for the later part of the room impulse response as well as for the simulation of diffuse reflections and diffraction. The geometry of reflective objects in the simulation is defined with irregular triangle networks instead of polygons. This is well suited for curved reflective surfaces found in ancient theatres and amphitheaters, as well as reflective bandshells often used in present day large outdoor performance spaces. |
