An Inversion of Acoustical Attenuation Measurements to Deduce Bubble Populations
An Inversion of Acoustical Attenuation Measurements to Deduce Bubble Populations
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DOI：
10.1175/jtech-d-11-00170.1
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发表时间：
2012-08
影响因子：
2.2
通讯作者：
H. Czerski
中科院分区：
文献类型：
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作者：
H. Czerski
海洋科学的许多领域都需要测量天然气泡的数量。声学方法有相当大的潜力，实现这一目标，因为气泡散射声音强烈接近其自然频率，这在很大程度上取决于气泡半径。使用由气泡群引起的体声衰减来推断存在的气泡的数量和尺寸的原理是公认的，并且用于测量宽带声衰减的适当方法也是公认的。然而，目前用于反演声衰减以获得气泡尺寸分布的数值方法复杂且耗时。在本文中，提出了一种反演的方法，使用气泡共振的物理结构的问题，使它可以准确地进行使用一个简单的矩阵求逆。这种反演方法产生的结果是正确的，在百分之几超过两个数量级的气泡大小。最有意义的…
AbstractMeasurement of natural bubble populations is required for many areas of ocean science. Acoustical methods have considerable potential for achieving this goal because bubbles scatter sound strongly close to their natural frequency, which depends largely on the bubble radius. The principle of using bulk acoustical attenuation caused by a bubble population to infer the number and size of bubbles present is well established, and appropriate methods for measuring broadband acoustical attenuation are also well developed. However, the numerical methods currently used to invert the acoustical attenuation to get the bubble size distribution are complex and time consuming. In this paper, a method for the inversion is presented that uses the physics of bubble resonance to restructure the problem so that it can be accurately carried out using a simple matrix inversion. This inversion method produces results that are correct to within a few percent over two orders of magnitude of bubble size. The most signific...