扩散声场

室内扩散声场的MonteCarlo模拟方法

The Monte Carlo method for simulating diffuse sound field

本文介绍了MonteCarlo方法模拟室内扩散声场的原理，模拟计算了混响室声场中的能量密度衰减曲线、能量脉冲响应、平均自由程及吸声系数等。

This paper reviews the principles of the Monte Carlo method for simulating the diffuse sound field and presents some results of the diffuse sound field in reverberation room , such as energy density decay function , energy impulse response , mean free path and absorption coefficient .

传声器扩散声场频率响应；传声器扩散场响应

Diffuse-field response of microphone

通过二维模型的计算，证明了房间形状的不规则性对室内扩散声场没有影响。

Calculating on two dimensional models . It has proved that the irregularity of the room shape is not influence the diffuse sound field in the room .

在扩散声场假设条件下，采用系统学、统计学等方法来处理室内声场，避免了繁杂的数学推导。

Supposing that the condition of diffusive sound field is known , a method to handle room sound field is given to avoid the complicated mathematical derivation , using system theory and statistics .

无规入射散射系数是在扩散声场中界面散射声能与总反射声能之间的比值，它是采用计算机模拟来对室内声场进行预测的重要参量。

Random-incidence scattering coefficient is the ratio of the scattered acoustics energy to the total reflected energy from a surface in a diffuse sound field . It is an important parameter in the prediction of sound field by computer simulation .

赛宾根据室内声场是充分扩散和声场是均匀衰减的假定，提出混响时间与房间容积成正比，与房间内总吸声量成反比。

Based on the assumptions that indoor acoustic field spread fully and decayed equally , Sabin proposed that the reverberation time is proportion to room 's volume , inverse proportion to the volume of sound absorption in the room .

因此，合理的建筑设计，装饰设计，合理吸声、扩散是营造良好声场，获得美好音质的有效手段。

Thus , reasonable construction design , ornament design , weakness and diffusion noise are the effective methods to gain excellent acoustics .