基于差分麦克风阵列的隐声方法  

Acoustic Zooming Technique Based on Differential Microphone Arrays

作　　者：梁菲菲 LIANG Feifei(School of Information Engineering,Shaanxi Polytechnic Institute,Xianyang 712000,China)

机构地区：[1]陕西工业职业技术学院信息工程学院,陕西咸阳712000

出　　处：《系统仿真技术》2024年第3期294-299,共6页System Simulation Technology

基　　金：陕西工业职业技术学院2024年度校级科研项目(2024YKYB-029);视觉智能技术创新团队(KCTD2024-02)

摘　　要：本文主要研究“隐声”技术,即如何获取来自指定区域内声源的声信号而滤掉位于该区域之外其他声源的声信号。该技术在智能手机、移动终端、电话会议、扩音等系统中具有广泛应用。首先,建立隐声数学模型,研究并分析基于差分波束形成的隐声方法。其次,对阵列端射方向的衰减曲线和频率响应曲线进行仿真,分析对干扰的隐声效果。最后,搭建一套隐声麦克风阵列系统,并在全消声暗室测试隐声性能。测试结果表明,基于差分麦克风阵列实现隐声具有可行性。This paper is devoted to study an acoustic zooming technique,which is to acquire high fidelity acoustic signals originated from a target region while rejecting those signals outside this region.The technology is widely used in smart phones,mobile devices,teleconference,public address systems and so on.The mathematical model for acoustic zooming is firstly established,the differential beam forming based zooming method for acoustic zooming is investigated.Secondly,simulations concerning the attenuation curve and frequency response curve of the array end radiation direction are performed to analyze the effect of interference on stealth.Finally,a zooming microphone array system is developed and the zooming performance is evaluated in the anechoic chamber.The evaluation results show that it is feasible to implement stealth based on differential microphone array.

关 键 词：差分波束形成 隐声技术 隐声半径 端射响应 

分 类 号：TN[电子电信] TP[自动化与计算机技术]