Measuring the characteristics of backscattering of sound on a rough surface in the near-field zone of a phased array

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• 作者：M. B. Salin ; O. A. Potapov ; B. M. Salin ; A. S. Chashchin
• 关键词：scattering by a rough surface ; scattered signal spectrum ; acoustic reverberation ; Bragg scattering ; three ; dimensional sea state spectrum ; phased array ; emitting linear cable array
• 刊名：Acoustical Physics
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：62
• 期：1
• 页码：74-88
• 全文大小：2,616 KB
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• 作者单位：M. B. Salin (1)
  O. A. Potapov (1)
  B. M. Salin (1)
  A. S. Chashchin (1)
  
  1. Applied Physics Institute, Russian Academy of Sciences, ul. Ul’yanova 46, Nizhny Novgorod, 603950, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Acoustics
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1562-6865

文摘

The paper presents the results of an experiment on measuring the characteristics of backscattering of sound waves by a rough surface. Measurements were conducted in the near zone of a vertical array, which made it possible with a high degree of accuracy to control the propagation conditions and the angles of incidence of an acoustic wave onto the surface. Tonal signals were emitted in a constant mode at frequencies of 0.5–3.5 kHz. The Doppler spectrum of the scattered signal was analyzed in detail, the spectral component corresponding to Bragg scattering was isolated, and the width of this component was determined. The possibilities of calculating the scattered field using two forms of the sea state spectrum are studied and compared: the two-dimensional spatiotemporal sea state spectrum, which was measured optically, and the conventional one-dimensional time spectrum, measured with a single surveying mark. Keywords scattering by a rough surface scattered signal spectrum acoustic reverberation Bragg scattering three-dimensional sea state spectrum phased array emitting linear cable array