文章摘要
卢义刚,黄坤朋,余光正.室内声学时域有限差分模拟中的边界条件[J].,2008,27(2):131-139
室内声学时域有限差分模拟中的边界条件
Boundary conditions of finite difference time domain simulation in room acoustics
  
中文摘要:
      给出了时域有限差分法用于室内声学问题模拟中的边界条件,结合声波方程的基本差分格式,模拟并分析了高斯脉冲在4m×4m房间中的波动过程和脉冲响应;模拟了一9m×6m×4m房间的简正频率,并与经典理论计算值进行了对比;模拟了一12m×5m×4m水平地面房间中的坐席吸声低谷效应,并与Joe LoVtri的模拟结果进行了对比;模拟并实际测量了一10.6m×5.8m×3.4m房间在几个受声点的脉冲响应和早期衰变时间EDT,将模拟结果与实际测量结果进行了对比分析,计算程序是用Metlab语言编写的。模拟与经典理论、相关研究、实际测量几方面的对比分析,验证了本边界条件的可靠性。
英文摘要:
      Boundary conditions of finite difference time domain simulation in room acoustics are deduced.Combine the boundary condition with the difference equations of the basic acoustic equations,the propagation of acoustic wave and impulse responses in a 4mx 4m room is simulated and analyzed.The normal frequencies of a 9m×6m×4m room are simulated,and compared with the values from classical theory.The seat dip effect in a 12m×5m×4m room is simulated,and the simulation is compared with Joe LoVtri’s result.Impulse responses in 7 receiver positions of a 10.6m×5.8m×3.4m room are simu- lated and measured;the impulse responses and EDT from simulation and measurement are compared.The programming language is Matlab.Comparisons of the simulation results with the results from classical theory,others simulation results and measurements verify the reliability of the proposed boundary conditions.
DOI:10.11684/j.issn.1000-310X.2008.02.009
中文关键词: 室内声学  时域有限差分  边界条件
英文关键词: Room acoustics  Finite difference time domain method  Boundary condition
基金项目:
作者单位
卢义刚 华南理工大学物理科学与技术学院,广州,510640 
黄坤朋 华南理工大学物理科学与技术学院,广州,510640 
余光正 华南理工大学物理科学与技术学院,广州,510640 
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