摘要
将四阶精度时域有限差分法(FDTD)用于三维房间的声场模拟,获得房间脉冲响应后,通过Dirac软件计算其混响时间RT、早期衰变时间EDT等室内声场音质参数,并与二阶精度方法的结果进行比较。结果显示,四阶算法可取比二阶算法更粗的网格,计算更快、更准确,将其利用于大空间的声场模拟更高效。
Apply the fourth-order Finite-Difference Time-Domain(FDTD) method to the simulation of three- dimensional room. After obtaining the room impulse response, we can compute the reverberation time(RT), early decay time(EDT) and other room acoustic parameters using Dirac. The result is compared with the second-order method. It shows that the fourth-order can choose coarser grid than the second-order, and it can compute faster and more accurate, which implies using the high-order FDTD in the simulation of large scale room is more efficient.
引文
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