应用于有源声辐射控制的一种组合次级声源  

A compound secondary source for active noise radiation control

作　　者：陈卫松[1,2] 浦宏杰[1] 邱小军[1] 

机构地区：[1]近代声学教育部重点实验室南京大学声学研究所,南京210093 [2]安徽师范大学,芜湖241000

出　　处：《应用声学》2010年第3期169-177,共9页Journal of Applied Acoustics

基　　金：国家自然科学基金资助项目(10674068);新世纪优秀人才支持计划;安徽高校省级自然科学研究项目(KJ2009B152Z)

摘　　要：在分析多通道单极子次级源控制系统的基础上,提出一种幅度调节型组合次级声源,这种组合源由两个单极子声源构成,单极子声源的间距远小于声波的波长。文中就组合次级源在自由场中对不同初级声源辐射噪声的控制进行理论分析和实验验证,并与同等条件下的单极子次级源控制系统的降噪性能进行了比较分析。数值计算和实验结果均表明,对于不同的初级声场,在次级通道数相同的情况下,组合次级源控制系统可以得到比单极子次级源控制系统高的降噪量。Based on the analysis of active control system with multi-channel monopole secondary sources, an amplitude adjustment compound secondary source is proposed in this paper. The proposed compound secondary source consists of two closely located monopole sources with their distance much smaller than a wavelength. Theoretical analysis and experiments on the compound source for different primary sources in the free field are given. The noise reduction characteristics of the compound secondary sources control system and the monopole secondary sources control system are compared under the same conditions. For different primary sound fields, both numerical and experimental results show that the compound secondary sources control system can provide larger noise reduction than the monopole secondary sources control system on condition that the numbers of control channels in the two systems are the same.

关 键 词：组合次级源 有源噪声控制 降噪量 

分 类 号：TB535.2[理学—物理]