Passive directivity detection of acoustic sources based on acoustic Luneburg lens

被引：3
|
作者：
Zhao, Liuxian [1 ]
Tang, Lihua [2 ]
Liu, Yuxin [3 ]
Sun, Zhaoyong [4 ]
Liu, Qimin [5 ]
Bi, Chuanxing [1 ]
机构：
[1] Hefei Univ Technol, Inst Sound & Vibrat Res, 193 Tunxi Rd, Hefei 230009, Peoples R China
[2] Univ Auckland, Dept Mech & Mechatron Engn, Auckland 1010, New Zealand
[3] Beijing Inst Graph Commun, Sch Mech & Elect Engn, 1 Xinghua Ave Band 2, Beijing 102600, Peoples R China
[4] Beijing Inst Graph Commun, Sch Basic Educ, Lab Appl Phys & Wave Engn, 1 Xinghua Ave Band 2, Beijing 102600, Peoples R China
[5] Wuhan Univ Technol, Sch Civil Engn & Architecture, Wuhan 430070, Peoples R China
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2023年 / 154卷 / 02期
关键词：
Acoustic noise measurement - Refractive index;
D O I：
10.1121/10.0020541
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
This article reports an acoustic Luneburg lens (ALL) design with graded refractive index for passive directivity detection of acoustic sources. The refractive index profile of the lens is realized based on square pillars with graded variation of their dimensions. Numerical and experimental studies are conducted to investigate the performance of directivity detection. The results demonstrate that the lens designed and developed in this study is capable of precisely detecting the directivity of one acoustic source. Furthermore, the directivities of two acoustic sources can also be detected with a resolution of 15 degrees. In addition, different methods are investigated, including introducing phase difference by tuning input signals or moving ALL, and increasing the aperture size of ALL, to improve the resolution of dual sources directivity detection. VC 2023 Acoustical Society of America.
引用
收藏
页码：594 / 601
页数：8
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