Reflection Characteristics of a Near-Interface Cavity in Ice at Supercritical Incidence

Wen-Kai Wang, Guang-Ping Zhu, Jing-Wei Yin and Hui Sun

Mathematical Problems in Engineering, 2019, vol. 2019, 1-11

Abstract:

The long-range propagation modes in an acoustic channel under ice are basically caused by supercritical incidence. The energy distribution and transmission loss in the acoustic channel under ice are changed by a scatter in ice. The influence of a slender cylindrical cavity near and parallel to the ice-water interface on the sound propagation is analyzed using Fourier-Bessel series and Sommerfeld-Watson transformation. The research found that the acoustic field presents a beam in the mirror reflection direction at supercritical incidence, and the beam-width is proportional to secant of incident angle; meanwhile, the reflected coefficient is proportional to cosine of incident angle. The reflection coefficient increases with relative depth and Helmholtz number if the incident angle is a constant.

Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:2143487

DOI: 10.1155/2019/2143487

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