Reflection Characteristics of a Near-Interface Cavity in Ice at Supercritical Incidence
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 i...
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| Veröffentlicht in: | Mathematical problems in engineering 2019-01, Vol.2019 (2019), p.1-11 |
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| container_title | Mathematical problems in engineering |
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| creator | Sun, Hui Yin, JingWei Zhu, GuangPing Wang, Wen-Kai |
| description | 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. |
| doi_str_mv | 10.1155/2019/2143487 |
| format | Article |
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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.</description><identifier>ISSN: 1024-123X</identifier><identifier>EISSN: 1563-5147</identifier><identifier>DOI: 10.1155/2019/2143487</identifier><language>eng</language><publisher>Cairo, Egypt: Hindawi Publishing Corporation</publisher><subject>Acoustic propagation ; Acoustics ; Angle of reflection ; Communication ; Earthquakes ; Energy distribution ; Energy transmission ; Engineering ; Fourier series ; Fourier-Bessel transformations ; Incidence ; Microstructure ; Propagation ; Propagation modes ; Reflectance ; Sound propagation ; Transmission loss ; Trigonometric functions</subject><ispartof>Mathematical problems in engineering, 2019-01, Vol.2019 (2019), p.1-11</ispartof><rights>Copyright © 2019 Wen-Kai Wang et al.</rights><rights>Copyright © 2019 Wen-Kai Wang et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 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| source | Wiley Online Library Open Access; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Acoustic propagation Acoustics Angle of reflection Communication Earthquakes Energy distribution Energy transmission Engineering Fourier series Fourier-Bessel transformations Incidence Microstructure Propagation Propagation modes Reflectance Sound propagation Transmission loss Trigonometric functions |
| title | Reflection Characteristics of a Near-Interface Cavity in Ice at Supercritical Incidence |
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