压电扬声器的后腔设计与实验  

Experimental Design of Piezoelectric Speaker Box

作　　者：沐永生[1] 马登永[1,2] 蔡野锋[1] 杨军[1] 周建明[2] 柴国强[2] 

机构地区：[1]中国科学院声学研究所通信声学实验室,北京100190 [2]苏州上声电子有限公司,江苏苏州215133

出　　处：《电声技术》2010年第11期32-35,共4页Audio Engineering

摘　　要：鉴于压电扬声器本身频响起伏较大,通过设计带吸声绵的多孔型薄层后腔,对其频响进行了改善,消除了带内较大的起伏。针对后腔封闭、开单孔、开多孔、开多孔但部分孔封闭、加吸声海绵等情况,分别对其频响进行仿真分析,并在全消声室内进行测试实验,基于测试结果,找到了较好的后腔设计方案。Because of the fluctuation characteristic of the frequency response of piezoelectric speaker itself, the exp- erimental design of the porous layer box with acoustic foam aims to improve the low frequency performance and to eliminate the large fluctuation in the pass band. Four cases are considered：closed box, box with one hole, box with many open porous, box with porous but some closure and box filled with acoustic foam and so on. The frequency responses are analyzed and simulated, and the testing experiment in the anechoic room is completed. Based on the results of those testing results, optimism solution of the design of speaker box is found.

关 键 词：后腔设计 压电扬声器 吸声绵 多孔型薄板 

分 类 号：TN643[电子电信—电路与系统]