带旁通的管道中的声能流及传声损失──Ⅰ：理论分析  

Acoustic energy flux and transmission loss in a duct with a by-pass, portⅠ:theoretical analysis

作　　者：戴根华 田瑞[1] 李鹭 王清理 朱之墀 

机构地区：[1]中国科学院声学所,清华大学,北京市化工学校,内蒙古工学院

出　　处：《声学学报》1995年第4期244-249,共6页Acta Acustica

基　　金：国家自然科学基金

摘　　要：本文在平面波条件下，利用管道分叉点上声压和质点体积速度的连续性，导出了带旁通的管道中的声能流及其传声损失方程，在微机上作了数值计算，计算结果具体例证了声能环流的存在以及传声损失的频率特性，并且从有源噪声控制的角度对结果作了讨论．The results of theoretical analysis for the transmission loss and the acoustic energy flux in a duct with different by-pass length and cross section have been verified by the experiments in the mentioned paper.There exists more noise reduction by using this type of duct with a by-pass for mono-frequency noise, 1 / 3 octave frequency band noise and white noise. Moreover,the frequency band of noise reduction is much wider.Meanwhile for experimental data processing the 'average mothed'presented in the paper is better than the previous'three point method'.

关 键 词：旁通 管道 声能流 传声损失 

分 类 号：O422.8[理学—声学]