Exterior-interior 3D sound field separation using a planar array of differential microphones
Date
2018-09-17
Authors
Zuo, Huanyu
Samarasinghe, Prasanga
Abhayapala, Thushara
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Publisher
IEEE
Abstract
Sound field separation using spherical microphone arrays was recently introduced and has many applications, however, it is inconvenient to implement in realistic environment. In this paper, we propose a solution to separate 3D interior and exterior sound field by using a planar array of differential microphones. The even coefficients and odd coefficients of sound fields are separated in two different ways due to the properties of associated Legendre functions. Simulation shows this practical geometry has a good performance on interior and exterior sound field separation in both noiseless and noisy environments. We also evaluate the reconstruction accuracy of separated sound fields on different spherical surfaces.
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Sound field recording, sound field separation, spherical harmonics
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16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018 - Proceedings
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Conference paper
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2037-12-31
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