Non-spherical microphone arrays for spherical harmonic analysis of 3D spatial sound fields
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Опубликовано 6 сентября 2016, 17:38
Array of microphone structures are capable of processing acoustic signals to extract useful spatial information of three-dimensional surroundings, and are important in a plethora of applications such as beamforming, direction of arrival estimation, and spatial sound field recording. This talk first shows why the spherical harmonic analysis is the ideal tool to use in these applications. Then we review the theory of spherical microphone arrays. The spherical array of microphones is suited in decomposing a 3D acoustic field into spherical harmonic components; however there are certain practical limitations. Finally, we show how to overcome these limitations by designing a 3D array structure consisting of circular arrays of microphones.
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