基于多通道系统的封闭空间低频噪声主动控制  

Low Frequency Noise Reduction in Closed Spaces Based on Multi-channel Active Noise Control System

作　　者：章月新 刘剑[1] ZHANG Yue-xin;LIU Jian(College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)

机构地区：[1]南京航空航天大学自动化学院,南京211106

出　　处：《科学技术与工程》2018年第35期236-241,共6页Science Technology and Engineering

基　　金：国家自然科学基金(61201364);中央高校基本科研业务费专项资金(NS2016034)资助

摘　　要：在封闭空间中,相较于单通道主动噪声控制(active noise control,ANC)系统,多通道ANC系统可以更好地实现整体区域的降噪。针对所设计的三维空间,分别进行单通道及双通道实验;并基于实验的方式布放次级源及误差传感器。实验结果证明,对于低频窄带噪声,多通道系统降噪效果显著,算法开启后在所设计装置空间内达到11. 4 d B的降噪量;且噪声声压级相较于单通道系统分布更为均匀。In an enclosed space,the multi-channel active noise control(ANC)system can better achieve overall area noise reduction compared to a single-channel ANC system.Single-channel and double-channel experiments are carried out for the designed three-dimensional space,and the secondary sources and error sensors are arranged based on the experimental method.The experimental results show that for low-frequency narrowband noise,the multi-channel system has a significant noise reduction effect.After the algorithm is turned on,the noise reduction of11.4dB is achieved in the designed device space,and the noise sound pressure level is evenly distributed than that of the single-channel system.

关 键 词：主动噪声控制 多通道 窄带 空间降噪 位置布放 

分 类 号：X593[环境科学与工程—环境工程]