会议论文详细信息
8th TSME-International Conference on Mechanical Engineering
Spherical beamforming for spherical array with impedance surface
Tontiwattanakul, Khemapat^1
Department of Mechanical and Aerospace Engineering, King Mongkut's University of Technology North Bangkok, 1518 Pracharat 1 Rd, Wongsawang, Bangsue, Bangkok
10800, Thailand^1
关键词: Acoustic beamforming;    Fibrous material;    Frequency ranges;    Impedance surface;    Spherical beamforming;    Spherical harmonics;    Spherical microphone array;    Three dimensional space;   
Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/297/1/012043/pdf
DOI  :  10.1088/1757-899X/297/1/012043
来源: IOP
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【 摘 要 】

Spherical microphone array beamforming has been a popular research topic for recent years. Due to their isotropic beam in three dimensional spaces as well as a certain frequency range, the arrays are widely used in many applications such as sound field recording, acoustic beamforming, and noise source localisation. The body of a spherical array is usually considered perfectly rigid. A sound field captured by the sensors on spherical array can be decomposed into a series of spherical harmonics. In noise source localisation, the amplitude density of sound sources is estimated and illustrated by mean of colour maps. In this work, a rigid spherical array covered by fibrous materials is studied via numerical simulation and the performance of the spherical beamforming is discussed.

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