An mm-sized biomimetic directional microphone array for sound source localization in three dimensions

作     者：Ashiqur ahaman Byungki Kim 

作者机构：School of Mechatronics EngineeringKorea University of Technology and EducationCheonan 31253Republic of Korea Future Convergence EngineeringKorea University of Technology and EducationCheonan 31253Republic of Korea 

出 版 物：《Microsystems & Nanoengineering》 (微系统与纳米工程（英文）)

年 卷 期：2022年第8卷第3期

页      面：77-89页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：supported by grants NRF-2018R1A6A1A03025526 under the Priority Research Program through the National Research Foundation of Korea(NRF)under the Ministry of Education and in partby NRF-2021R1A2C1004540 under the Ministry of Science and ICT and in part by the BK-21 Four program through National Research Foundation of Korea(NRF)under Ministry of Education 

主　　题：directional dimensions sound 

摘      要：Fly Ormia ochracea ears have been well-studied and mimicked to achieve subwavelength directional sensing,but their efficacy in sound source localization in three dimensions,utilizing sound from the X-,Y-,and Z-axes,has been less *** paper focuses on a mm-sized array of three Ormia ochracea ear-inspired piezoelectric MEMS directional microphones,where their in-plane directionality is considered a cue to demonstrate sound source localization in three *** the array,biomimetic MEMS directional microphones are positioned in a 120°angular rotation;as a result,six diaphragms out of three directional microphones keep a normal-axis relative to the sound source at six diferent angles in the azimuth plane starting from 0°to 360°in intervals of±30°.In addition,the cosine-dependent horizontal component of the applied sound gives cues for Z-axis directional *** whole array is frst analytically simulated and then experimentally measured in an anechoic *** results are found to be compliant,and the angular resolution of sound source localization in three dimensions is found to be±2°at the normal *** resolution at the azimuth plane is found to be±1.28,and the same array shows a±4.28°resolution when sound is varied from the elevation *** at the scope within this area combined with the presented results,this work provides a clear understanding of sound source localization in three dimensions.