Joint Patch Near-Field Holography
Joint Patch Near-Field Holography
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关节贴片近场全息术
DOI：
10.3813/aaa.918145
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发表时间：
2009-03
影响因子：
--
通讯作者：
Chen, Jin
中科院分区：
文献类型：
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作者：
Yang, Chao;Jia, Wen-qiang;Chen, Jin
传统的声波叠加法由于缺乏等效的声源构型信息，无法精确地重建声场。基于统计最优的近场声学全息和波叠加法，提出了一种联合贴片近场全息（JPNAH）方法。其基本思想是利用统计最优的近场声学全息技术确定波叠加法所必需的虚拟声源位置，然后利用波叠加法高效、精确地重建复杂声场。除了重建贴片声场外，JPNAH还有许多其他优点。首先，JPNAH技术对贴片区域外的声源不敏感。其次，与NAH相比，JPNAH在低频范围内表现更好。最后，利用JPNAH可以实现复杂声场的实时映射。基于单脉冲球模型进行了数值模拟；运动实验也在半消声室进行。数值模拟和实验结果表明，JPNAH可以用于重建复杂声源辐射的声场。
Traditional wave superposition method can't reconstruct the sound field precisely because of the absence of the equivalent source configuration information. A method named Joint Patch Near-field Holography (JPNAH) is proposed based on the statistically optimal near-field acoustical holography and the wave superposition method. The basic idea is that the fictitious sources' location essential to the wave superposition method can be decided by the statistically optimal near-field acoustical holography, and then complex sound field will be reconstructed by the wave superposition method with high efficiency and precision. Besides the reconstruction of the patch sound field, the JPNAH has many other virtues. Firstly, the JPNAH technique is not sensitive to the sound source outside the patch area. Secondly, compared to the NAH, the JPNAH performs better in the low frequency range. Finally, it is possible to achieve a real-time mapping of the complex sound field by using the JPNAH. Numerical simulations were performed based on a single-pulse-ball model; and also motor experiments were carried out in a semi-anechoic chamber. Both of numerical simulations and experiments show that the JPNAH can be used to reconstruct the sound field radiated from a complex sound source.