Very low frequency three-dimensional beamforming for a miniaturized aperture acoustic vector sensor array

Junyuan Guo; Liangwen Li; Shengchun Piao; Lijia Gong; Minghui Zhang

doi:10.1121/10.0010535

Very low frequency three-dimensional beamforming for a miniaturized aperture acoustic vector sensor array

JASA Express Lett. 2022 May;2(5):054805. doi: 10.1121/10.0010535.

Authors

Junyuan Guo¹, Liangwen Li¹, Shengchun Piao¹, Lijia Gong¹, Minghui Zhang¹

Affiliation

¹ Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China guojunyuan@hrbeu.edu.cn, liliangwen@hrbeu.edu.cn, piaoshengchun@hrbeu.edu.cn, lijia.gong@hrbeu.edu.cn, zhangminghui@hrbeu.edu.cn.

PMID: 36154073
DOI: 10.1121/10.0010535

Abstract

In this Letter, a three-dimensional beamforming method is proposed for a miniaturized aperture acoustic vector sensor (AVS) array. This method extracts the multipole modes using the AVS array, and then synthesizes the desired beam pattern according to the relation between multipole modes and spherical harmonics. Compared to the spherical harmonics decomposition of the sound field method, the proposed method achieves comparable array gain with higher white noise gain when the distance of adjacent elements d and the wavelength λ satisfy 0.01≤d/λ≤0.2. Experimental results also demonstrate the effectiveness of the proposed three-dimensional beamforming method at very low frequency.