应用时域有限差分法计算房间脉冲响应和声场参数  

Calculation of Room Impulse Reponse and Acoustic Parameters by Finite-difference Time-domain Method

作　　者：黄坤朋[1,2] 赵越喆[1] 

机构地区：[1]华南理工大学亚热带建筑科学国家重点实验室,广州510640 [2]国光电器股份有限公司博士后工作站,广州510800

出　　处：《土木建筑与环境工程》2013年第3期157-161,共5页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(50938003)

摘　　要：在室内声学时域有限差分(FDTD)计算模型中,将房间的复阻抗边界用数字阻抗滤波器描述,并给出了门、窗和墙壁的数字滤波器复阻抗模型,应用该模型计算房间脉冲响应和声场参数。对一真实房间,将FDTD模拟计算得到的房间脉冲响应和声学参数与实际测量结果相比较,验证了在室内声学FDTD计算中,采用数字滤波器近似的复阻抗边界模型能较好地模拟房间中的声场。The administrator boundaries in room were modeled by digital filters of complex impedance in finite-difference time-domain （FDTD） method. Doors, windows and walls were described respectively by their complex impedance boundaries with digital filters. Impulse responses in a room were calculated with the FDTD model, and typical room acoustics parameters were obtained from the responses. The high correlation coefficients between the calculated and measured impulse responses and the good agreement in acoustic parameters show that sound field in room can be properly simulated by this FDTD model.

关 键 词：室内声学 时域有限差分法(FDTD) 声学复阻抗边界 数字滤波器 

分 类 号：TU112[建筑科学—建筑理论]