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Source-Location-Informed Sound Field Recording and Reproduction: A Generalization to Arrays of Arbitrary Geometry

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A sound field recording and reproduction method that takes into account prior information on the locations of primary sources is proposed. Current recording and reproduction methods are generally based on sound field analysis and synthesis in the spatial Fourier domain. However, the size of the reproduced region and the maximum reproduced frequency are limited by the spatial Nyquist frequency. We previously proposed a source-location-informed sound field recording and reproduction method for several array geometries, which enables higher reproduction accuracy above the spatial Nyquist frequency. We here generalize this method for application to arbitrary array geometries. It is shown that two requirements must be satisfied to generalize the method by using an example of cylindrical arrays of microphones and loudspeakers.

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AES - Audio Engineering Society