A HIGHER-ORDER FINITE-DIFFERENCE TIME-DOMAIN METHOD FOR SOUND PROPAGATION

被引：0
|
作者：
Huang, Wuqiong [1 ]
Lu, Yigang [1 ]
机构：
[1] South China Univ Technol, Sch Architecture, Guangzhou, Guangdong, Peoples R China
来源：
PROCEEDINGS OF 2016 INTERNATIONAL CONFERENCE ON AUDIO, LANGUAGE AND IMAGE PROCESSING (ICALIP) | 2016年
关键词：
FDTD; acoustics; dispersion; stability; MAXWELLS EQUATIONS; FDTD SCHEMES; SIMULATION; MEDIA;
D O I：
暂无
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
A higher-order Finite-Difference Time-Domain method for acoustics is presented, namely, a second-order-in-time, fourth-order-in-space method: FDTD (2, 4). The influence of the stability condition on FDTD (2, 4) is investigated, and we compare this method with FDTD (2, 2) in one-dimensional coordinate system. From the results of numerical dispersion analyses and sound wave propagation, we know that the higher-order method computes faster and more stable than the second-order method. This signifies that a larger space step size can be chosen by the higher-order method for the same excitation, which will reduce the computer memory on a coarse grid. This higher-order method is also simulated in the impedance boundary which is close to an actual wall. The results prove that higher-order method has a high efficiency and can be used in more complex room boundaries.
引用
收藏
页码：136 / 140
页数：5
相关论文
共 50 条
12345