Scattered acoustic intensity field measurements of a rigid motionless sphere and cylinder

R. J. Barton, Geoffrey R. Moss, Kevin B. Smith
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Abstract

In this study, the properties of the scattered acoustic vector fields generated by a simple rigid motionless sphere and cylinder are investigated. Analytical solutions are derived from general acoustic pressure scattering models, and analyzed for wave numbers in the resonance region. The separable active and reactive components of the acoustic intensity are used to investigate the structural features of the scattered field components. The ability to extract scattered field features is illustrated with measurements obtained from in-air experiments using an anechoic chamber and acoustic intensity probes to measure the scattered acoustic vector field resulting from continuous plane wave illumination.
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刚性静止球和圆柱的散射声强场测量
本文研究了简单刚性不动球和圆柱产生的散射声矢量场的特性。推导了一般声压散射模型的解析解,并对共振区的波数进行了分析。利用声强的可分有功和无功分量来研究散射场分量的结构特征。通过使用消声室和声强探头测量连续平面波照明产生的散射声矢量场的空气实验获得的测量结果,说明了提取散射场特征的能力。
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