封闭空腔结构-声耦合场内响度研究

Sound loudness of structure-acoustic coupling field in an enclosed cavity

基于结构-声耦合场有限元模型和Zwicker的响度模型,研究了封闭空腔内结构-声耦合场的响度.在考虑了人类听觉对频率的选择性接收的前提下,研究了参与耦合的板的厚度对特征频带声强级的影响,讨论了从特征频带声强级到响度的转换过程.结果表明,观测点声响度变化并不与板厚的变化成比例关系.通过合理选择板厚,可以在观测点上重点关注的相关频带内获得需要的声响度,从而为产品声响度设计提供方法.

Sound loudness of structure-acoustic coupling field in an enclosed cavity was studied by using finite element model of structure-acoustic coupling field in an enclosed cavity and Zwicker′s loudness model.In consideration of human hearing system′s frequency selectivity,the effects of thickness of coupling plate on critical-band level were also explained.The transformation progress of critical-band level to sound loudness in acoustic-structure coupling field of an enclosed cavity was illustrated which is caused by human hearing frequency selectivity characteristic. The results indicated that the changing sound loudness at the observation point was not directly proportional to the changing plate thickness. Through reasonable selection of plate thickness, the sound loudness can be gained in the focusing related frequency band at certain observation point, so as to provide methods for production＇s sound loudness design.