摘要
为解决有源声屏障集中式系统设计难以大尺度应用,而分散式系统将实现软边界作为目标导致的远场效果差的问题,本文在Berkhoff等工作基础上,基于分散式系统架构,提出基于声屏障顶部近场传声器的有源控制策略,从近场传感器信号导出虚拟误差信号以实现远场降噪。依据本方法在半消声室构建有源声屏障系统,通过实验测试验证提出的方法,实验表明:本文建立的有源声屏障系统在设计目标频段实现了声屏障后部大范围空间的有效降噪;相比普通的集中式和分散式有源声屏障,本文方法具有降噪范围更大、更均衡,并可直接扩展至大尺度声屏障的优点。
In order to solve the problems that the centralized system design of active noise barrier was difficult to be applied in a large scale and while the poor far-field effect was caused by the realization of soft boundary as the goal of distributed system.Based on the decentralized system,an active control strategy based on near-field microphone at the top of sound barrier is proposed with the help of the work of Berkhoff et al.in this paper.The virtual error signals were derived from near-field sensor signals to achieve far-field noise reduction.According to this method,an active noise barrier system was constructed in a semi-anechoic chamber,and the proposed method was verified by experimental tests.The experimental results show that the active noise barrier system established in this paper could effectively reduce the noise in a large range space behind the noise barrier in the designed target frequency band.Compared with the common centralized and distributed active noise barriers,the proposed method has the advantages of larger noise reduction range,more balanced,and can be directly extended to large scale noise barriers.
作者
侯子龙
乔学礼
吴瑞
HOU Zilong;QIAO Xueli;WU Rui(BMILP Science&Technology Development Co.,Ltd.,Beijing 100054,China;Beijing Municipal Commission of Transport,Beijing 100073,China;Institute of Urban Safety and Environmental Science,Beijing Academy of Science and Technology,Beijing 100054,China)
出处
《安全》
2023年第3期57-62,共6页
Safety & Security
基金
北京市财政资金项目(11000023T000001876365,11000022T000000446274)。
关键词
有源声屏障
实验研究
分散式系统
远场
active noise barrier
experimental study
distributed system
far field
