小尺度封闭空间可听化研究  

Research of Auralization in Small Enclosures

作　　者：宁方立[1] 韦娟[2] 

机构地区：[1]西北工业大学机电学院,陕西西安710072 [2]西安交通大学系统工程研究所,陕西西安710049

出　　处：《系统仿真学报》2004年第6期1242-1244,共3页Journal of System Simulation

基　　金：国家自然科学基金(19874050);西北工业大学青年教师创新基金。

摘　　要：在小尺度封闭空间内,声波低频成份的波长与空间尺寸相当,声音在传播过程中所发生的散射、衍射等波动现象不容忽视。因此,目前以几何声学为理论基础的可听化无法直接用于小尺度封闭空间中,需要发展以波动声学为理论基础的可听化。本文将以室内声场有源Helmholtz方程及其相应边界方程为基础,首先推导了求解小尺度封闭空间低频声传递函数的有限元模型。其次,研究了在小尺度封闭空间内的双耳特性的处理方法。最后,给出了小尺度封闭空间可听化的软件实现方法,并在一车体模型内实现了可听化。Because of wavelength of sound in low frequency being close to dimensions of small enclosures, scattering and diffraction in the course of sound radiation couldnt be ignored. As a result, auralization based on geometrical acoustics cant be applied in small enclosures. In this paper, firstly, based on Helmholtz equation and its boundary equations, model of Finite Element Method (FEM) is given for computing low frequency sound transfer function in small enclosures. Secondly, processing method for binaural characteristic is put forward. Lastly, detailed steps for the realization of auralization software in small enclosures are presented. As an example, the auralization is used in one car cavity.

关 键 词：主观 音质评价 小尺度封闭空间 可听化 有限元 

分 类 号：TU112[建筑科学—建筑理论]