基于不同幅值分布的扬声器阵列波束形成研究  

Beamforming Design for Linear Loudspeaker Array with Different Feeding Distribution

作　　者：汪博[1] 黄英杰[1] 谢湘[1] 张保英[1] 袁世明 

机构地区：[1]北京理工大学,北京100081 [2]精拓丽音科技(北京)有限公司,北京100016

出　　处：《电声技术》2013年第6期31-34,45,共5页Audio Engineering

摘　　要：近年来,扬声器阵列由于能产生指向性声束而得到越来越多的关注和研究,在家电产品中也得到了日益广泛的应用,平板电视如何利用超薄扬声器阵列产生指向性声束成为当前热点。在1 kHz的条件下,分别对均匀分布、二项分布、三角分布、倒三角分布以及Dolph-Chebyshev加权5个不同的幅值分布算法进行了仿真和分析。结果表明,不同的幅值加权算法,对于扬声器阵列波束形成有显著影响。其中,Dolph-Chebyshev加权在主波束宽度和旁瓣级之间做了很好的折中,是扬声器阵列直线阵中的一种比较理想的幅值加权方式。最后,对Dolph-Chebyshev加权进行了实验,进一步进行了论证。In the recent years, loudspeaker array has been widely considered and used in household appliance products. For the fiat - panel TV, how to use the ultra - thin loudspeaker array to generate a directional beam is becoming the current research focus. In this paper, the beamforming effects of linear loudspeaker array with different feeding distributions are compared. The simulation configures 7 loudspeakers in a line with a gap of 14cm. Its directional diagrams under lkHz are examined with 5 types of feeding distributions, which include the uniform, binomial, triangular, inverted triangular and Dolph - Chebyshev distributions. The simulation shows that the linear loudspeaker array beamforming is significantly impacted by the feeding distributions and Dolph - Chebyshev distribution has the ideal performance in beamforming, which is because it makes a good compromise between the main lobe width and the side lobe height.

关 键 词：扬声器阵列 波束形成 幅值分布 Dolph—Chebyshev加权 

分 类 号：TN643[电子电信—电路与系统]