Scattering of sound waves by a canonical acoustic hole
Scattering of sound waves by a canonical acoustic hole
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典型声孔对声波的散射
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
L. Crispino
中科院分区：
文献类型：
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作者：
S. Dolan;E. S. Oliveira;L. Crispino
这是一个单色平面微扰撞击标准声孔的研究。我们发现声孔散射与黑洞散射具有相同的关键特征。波阵面在孔周围以相反的感觉通过的干涉产生了散射强度的规则振荡。我们通过应用部分波方法来计算入射波长范围内的微分散射截面来检验这种效应。我们证明了反向散射峰的存在，称为光荣峰。我们发现，在视界波长比相等的情况下，标准声洞产生的光的强度大约是史瓦西黑洞产生的光的170倍。我们希望在不久的将来可以对这种效应进行直接的实验观察。
This is a study of a monochromatic planar perturbation impinging upon a canonical acoustic hole. We show that acoustic hole scattering shares key features with black hole scattering. The interference of wave fronts passing in opposite senses around the hole creates regular oscillations in the scattered intensity. We examine this effect by applying a partial wave method to compute the differential scattering cross section for a range of incident wavelengths. We demonstrate the existence of a scattering peak in the backward direction, known as the glory. We show that the glory created by the canonical acoustic hole is approximately 170 times less intense than the glory created by the Schwarzschild black hole, for equivalent horizon-to-wavelength ratios. We hope that direct experimental observations of such effects may be possible in the near future.