Stochastic allocation strategy for irregular arrays based on geometric feature control

Jingjing Yu, Qi Xi, Runlei Li, Hui Tian and Yaxi Xie

International Journal of Distributed Sensor Networks, 2020, vol. 16, issue 5, 1550147720921775

Abstract: Irregularities in microphone distribution enrich the diversity of spatial differences to decorrelate interferences from the beamforming target. However, the large degrees of freedom of irregular placements make it difficult to analyse and optimize array performance. This article proposes fast and feasible optimal irregular array design methods with improved beamforming performance for human speech. Important geometric features are extracted to be used as the input vector of the neural network structure to determine the optimal irregular arrangements of sensors. In addition, a hyperbola design method is proposed to directly cluster microphones in the hyperbola areas to produce rich differential distance entropies and yield significant signal-to-noise ratio improvements. These methods can be easily applied to guide non-computer-aided optimal irregular array designs for human speech in acoustic scenes such as immersive cocktail party environments.

Keywords: Irregular array; beamforming; geometric feature; sensor distribution; cluster design (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:sae:intdis:v:16:y:2020:i:5:p:1550147720921775

DOI: 10.1177/1550147720921775

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