文章摘要
杨益,阎兆立,温周斌,冯海泓,付奇.超指向性扬声器的阵列设计与研究[J].声学技术,2008,(3):433~438
超指向性扬声器的阵列设计与研究
Design and research of an ultrasonic transducer array applied in audio beam loudspeaker
投稿时间:2007-07-18  修订日期:2007-09-12
DOI:
中文关键词: 超指向性扬声器  阵列设计  指向性  传感器相位
英文关键词: audio beam loudspeaker  array design  directivity  transducer phases
基金项目:
作者单位E-mail
杨益 中国科学院声学研究所东海研究站, 上海, 200032  
阎兆立 中国科学院声学研究所, 北京, 100080  
温周斌 中国科学院嘉兴中心声学所分中心, 浙江, 314050  
冯海泓 中国科学院声学研究所东海研究站, 上海, 200032 fenghaihong@263.net 
付奇 中国科学院嘉兴中心声学所分中心, 浙江, 314050  
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中文摘要:
      超指向性扬声器的阵列设计要求阵列具有高指向性,并且无旁瓣。基于对线列阵和矩形平面阵的理论分析,以及均匀线列阵和矩形交错阵的理论分析和比较,提出了一种六边形交错阵列设计,计算机模拟和实测均表明该阵列3dB波束宽度小于5°主旁瓣比为8.3,满足设计要求。初步分析了传感器相位对换能器阵列指向性的影响,为挑选换能器阵元组成阵列提供了理论指导。
英文摘要:
      The design of a ultrasonic transducer army for audio beam loudspeaker requires high directivity and no sidelobe.Based on the theoretical analysis of the linear array and rectangular array,compared with linear array, crossed array and interleaving rectangular array,a novel crossed hexagon array is proposed. It has been proved by theoretical analysis and experiment that this array can completely satisfy the requirement of designing the ultrasonic transducer array for audio beam loudspeaker with the 3dB beamwidth less than 5 degree and the ratio of mainlobe to sidelobe of 8.3. Meanwhile the effect of transducers' phase on the ultrasonic transducer array is considered for the convenience of selecing trans-ducers to form the array.
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