相控阵扬声器系统的设计与测试  

Design and Testing of the Phased Array Speaker System

作　　者：纪璐 温今凡 温怀疆[1] JI Lu;WEN Jinfan;WEN Huaijiang(College of Media Engineering,Communication University of Zhejiang,Hangzhou 310018,China;School of Mechanical Engineering,Lanzhou Jjiaotong University,Lanzhou 730070,China)

机构地区：[1]浙江传媒学院媒体工程学院,浙江杭州310018 [2]兰州交通大学机电工程学院,甘肃兰州730070

出　　处：《电声技术》2022年第7期44-50,共7页Audio Engineering

基　　金：2020年浙江省基础公益研究项目——宽带声波的可调指向性扬声器阵列的研究与开发(No.GF20F010001)。

摘　　要：采用多路分频的设计思路来实现宽频域(200~12 800 Hz)音频指向性可控,提出六倍频程音频频谱信号的相控阵声场偏转的初步解决方案,设计、制作并搭建6分频相控阵扬声器系统测试平台。通过在半消音室内测试均匀加权和切比雪夫加权方式下,不同线阵列扬声器组在各阵元相位差为30°时相应频率的声场分布情况,最后在分析测试结果并得到相关结论的基础上提出一种制造可改变声场指向性的相控阵扬声器系统的初步方案。In this paper, the multi-channel frequency division design idea is adopted to realize the directivity control of audio in the wide frequency domain(200 ~ 12 800 Hz). The preliminary solution of the phased-array sound field deflection of the six-octave audio spectrum signal is proposed. The platform for testing the six-octave phased array speaker system is designed, manufactured and built. The sound field distribution of different line array loudspeaker groups with phase difference of 30° is tested by means of uniform weighting and Chebyshev weighting in a semi-muffled chamber. Finally, based on the analysis of test results and relevant conclusions, a preliminary scheme of fabricating phased array loudspeaker system which can change the directivity of sound field is proposed.

关 键 词：相控阵 扬声器 指向性 倍频程 

分 类 号：TN643[电子电信—电路与系统]