Prager Jens
Institute of Fluid Mechanics and Engineering Acoustics, Technical University of Berlin, Berlin, Germany.
J Acoust Soc Am. 2007 Oct;122(4):2067-73. doi: 10.1121/1.2770539.
This paper presents an investigation of the reconstruction of sound field parameters close to the surface of arbitrarily shaped sound sources. The field is reconstructed using nearfield acoustical holography (NAH) in spherical coordinates. Of particular interest are source shapes where the Rayleigh hypothesis is violated. To overcome the limitation of the minimal sphere given by the validity restriction of the Rayleigh hypothesis an algorithm is proposed for extracting local information from the nonconvergent NAH solution. For the assessment of the results an appropriate virtual test rig is developed employing the Kirchhoff-Helmholtz integral theorem.
本文介绍了对任意形状声源表面附近声场参数重构的研究。该场是在球坐标系中使用近场声学全息术（NAH）进行重构的。特别令人感兴趣的是违反瑞利假设的声源形状。为了克服瑞利假设有效性限制所给出的最小球体的局限性，提出了一种从非收敛的NAH解中提取局部信息的算法。为了评估结果，利用基尔霍夫 - 亥姆霍兹积分定理开发了一个合适的虚拟测试装置。
