Extended sound field recording using position information of directional sound sources
Extended sound field recording using position information of directional sound sources
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DOI：
10.1109/waspaa.2017.8170020
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发表时间：
2017-10
期刊：
影响因子：
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通讯作者：
K. Wakayama;J. Treviño;H. Takada;S. Sakamoto;Yôiti Suzuki
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文献类型：
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作者：
K. Wakayama;J. Treviño;H. Takada;S. Sakamoto;Yôiti Suzuki
提出了一种可以记录任意方向性声源产生的扩展声场的方法。以球谐展开形式给出的声场记录在由最高展开级数限制的区域内有效。在目前的方法中，使用多个球形麦克风阵列来记录大区域上的声场。以前，我们提出了一种方法，利用声源位置的近似知识，使用平移算子从单个麦克风阵列记录中合成空间任意位置的声场。该方法在翻译运算符的定义中仅假定全向声源。本文研究了将以前的结果推广到具有任意辐射方向性模式的声源的问题。考虑到复杂声源可以近似为多极子的集合，计算了一种新的平移算子。数值模拟和实际测量结果表明，所提出的多极平移算子可以有效地从单个球形麦克风阵列记录中合成扩展的声场信息。
We propose a method that can record extended sound fields generated by sound sources with arbitrary directivity. Sound field recordings given as a spherical harmonic expansion are valid within a region limited by the highest expansion order. In current methods, multiple spherical microphone arrays are used for recording sound fields over large regions. Previously, we proposed a method to take advantage of the approximate knowledge of the sound source position to synthesize sound field anywhere in space from a single microphone array recording using a translation operator. This method assumes only omni-directional sound sources in the definition of the translation operator. The present research deals with the problem of extending previous results to sound sources with arbitrary radiation directivity patterns. A new translation operator is calculated taking into account that complex sound sources can be approximated as a collection of multipoles. The results of numerical simulations and actual measurements show that the proposed multipole translation operator can effectively synthesize extended sound field information from a single spherical microphone array recording.