通过分流扬声器实现管道噪声控制  

Duct noise control by using shunt loudspeaker

作　　者：柳维玮 毛崎波[1] LIU Wei-wei MAO Qi-bo(School of Aircraft Engineering, Nanchang Hangkong University, Nanchang 330063, Jiangxi, Chin)

机构地区：[1]南昌航空大学飞行器工程学院,江西南昌330063

出　　处：《声学技术》2017年第5期455-460,共6页Technical Acoustics

基　　金：国家自然基金项目11464031;51265037;航空科学基金项目2015ZA56002;江西省高校科技落地计划资助项目KJLD12075;江西省研究生创新专项资金项目YC2016-S336

摘　　要：提出通过分流扬声器控制管道噪声。首先采用一个干扰扬声器放置在管道的一端作为噪声源,另一个扬声器外接分流电路组成分流扬声器对管道噪声进行控制,并建立管道-扬声器耦合模型。然后设计参数独立可调的分流电路,实现对分流扬声器的固有频率和阻尼比的独立调节,通过优化分流电路的参数,从而使得分流扬声器达到良好的控制效果。最后对所设计的分流扬声器的控制效果进行了数值计算。结果表明:所设计的分流扬声器能够有效控制管道内的声压。与传统的噪声主动控制方法相比,该方法的主要优点在于控制系统不需要误差传感器和控制器,结构简单,实际使用方便。The theoretical calculation and method of shunt loudspeaker controlling duct noise are given in this paper. Firstly, with a disturbance speaker placed at one end of duct as the noise source, another speaker connected shunt circuit is placed at side of the duct as a control unit of duct noise. The ductloudspeaker coupling model is set up. Secondly, adjustable parameters of shunt circuit are designed to realize independent regulations for the natural frequency and damping coefficient of the control speaker. According to the optimized parameters of shunt circuit, the control speaker can achieve good control effect. Finally, the control effect of the shunt speaker is calculated numerically by using Matlab software. Results show that the designed shunt speaker can control the pressure in the duct effectively. Compared with the conventional active noise control, the major advantage of this method is that the control system does not need error sensor and controller, so the structure is simple and convenient for application.

关 键 词：管道噪声 分流扬声器 分流电路 

分 类 号：O422.8[理学—声学]