基于波束成形理论的传声器阵列声场仿真分析

基于用传声器阵列测量空间声场信息的波束成形技术,在声场可视化和噪声源识别中得到了广泛的研究与应用。利用波束成形技术分析噪声源时,不同的传声器阵列布局会对分析结果产生不同影响。在合理化假设的条件下,基于MATLAB软件对线性、矩形、圆形、半圆形4种不同阵列的处理效果进行仿真,并对仿真结果进行分析。比较识别精度、传声器数目和图形对称性等综合因素,得出圆形阵列具有最好综合效果的结论。

Acoustic Field Simulation Analysis of Microphone Array Layout Based on the Theory of Beam Forming

Based on the beam forming technology,it utilizes the microphone array layout to attach information of the specific acoustic field,analyzes the visualization and identification of noise sources. It shows the various influences of different microphone array layout,demonstrates the process and analysis of different layout simulation with rational hypothesis among linear,rectangle,circle and semi- circle via Matlab. Considering the identification accuracy,the number of microphones required and graphic symmetry,the simulation result shows that the circle layout is highly effectivs.