中文摘要：

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。

英文摘要：

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.