带空腔尖劈吸声器吸声性能的研究  

A study on the absorbing performance of a wedge absorber with cavity

作　　者：王仁乾[1] 马黎黎[1] 缪旭弘[2] 

机构地区：[1]北京大学电子学系,北京100871 [2]海军论证中心,北京100073

出　　处：《声学技术》1999年第4期146-148,157,共4页Technical Acoustics

摘　　要：本文研究带有空腔的锥形尖劈吸声器的吸声性能。文中给出了一种计算该吸声器的吸声系数的方法，并对吸声系数与频率的关系进行计算机仿真。仿真结果表明：带有空腔的尖劈吸声器相对普通尖劈吸声器，除保持高频段较好吸收性能外，在低频段吸声系数有显著提高；通过改变空腔结构可以改善吸声器的低频吸声性能。The absorbing performance of a wedge absorber with recavitytor is studied.The theoretical method for calculating the absorption coefficient of the absorber is provided and the relationship between the absorption coefficient and frequencies is given by computer simulation.The results showed that the absorption performance of this kind of absorber is better than normal wedge absorbers in low frequency and it keeps good absorbing performance in high frequency.The performance in low frequency can be improved by changing the size and structure of the resonator

关 键 词：尖劈吸声器 共振 空腔 变截面管 吸声性能 

分 类 号：TB535.2[理学—物理]