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2023 | OriginalPaper | Chapter

Spatial Interpolation Methods for Virtual Rotating Array Beamforming with Arbitrary Microphone Configurations

Authors : Jiacheng Yang, Ce Zhang, Wei Ma

Published in: Proceedings of the International Conference on Aerospace System Science and Engineering 2021

Publisher: Springer Nature Singapore

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Abstract

Virtual rotating array (VRA) beamforming is a robust technique in the identification of rotating sound sources in frequency-domain. Under normal circumstances, the configuration of microphone array is established in ring geometry centered around the rotating axis. Two interpolation methods for arbitrary microphone configurations are proposed by Jekosch and Sarradj (Acoustics 2020). One is to construct a mesh between all stationary microphones using Delaunay-triangulation, another one is a meshless technique based on radial basis function. However, whether other spatial interpolation methods are available in VRA beamforming with arbitrary microphone configurations is still unclear. This paper adds several new spatial interpolation methods in VRA beamforming and detailedly compares the performances of these interpolation methods in simulations. The simulating results demonstrated that all these interpolation methods are successfully applied in VRA beamforming with arbitrary microphone configurations. Inverse distance weighting interpolation method owns the best performance in rotating sound source localization. Additionally, all these interpolation methods have poor spectrum construction capability and sound source strength precision.

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Title: Spatial Interpolation Methods for Virtual Rotating Array Beamforming with Arbitrary Microphone Configurations
Authors: Jiacheng Yang
Ce Zhang
Wei Ma
Publisher: Springer Nature Singapore
Book: Proceedings of the International Conference on Aerospace System Science and Engineering 2021
Print ISBN: 978-981-16-8153-0

Electronic ISBN: 978-981-16-8154-7

Copyright Year: 2023
DOI: https://doi.org/10.1007/978-981-16-8154-7_3

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