| Presentation | 2000/8/25 Asymptotic Analyses of Sound Propagation in Shallow Water Toyohiko ISHIHARA, Kouji OHSHIMA, Zengo TANAKA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The purpose of the present investigation is to propose asymptotic representations in both time-domein and frequency-domain for calculating the sound propagation in shallow water, with the sound velocity increasing exponentially from the sea surface to the bottom. We derive the asymptotic solutions for acoustical rays reflected both at the surface and the bottom and those which are reflected only at the sea surface, the uniform solution applicable near the ray caustic, the complex ray solution, the bottom diffracted ray solution and the lateral wave solution. Comparisons of the asymptotic solutions with the mode solution confirm the validity and the numerical efficiency of the proposed solutions. The influence of the bottom loss is also clarified. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | shallaw water / sound propagation / asymptotic analysis / complex ray / lateral wave |
| Paper # | US2000-38 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 2000/8/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Asymptotic Analyses of Sound Propagation in Shallow Water |
| Sub Title (in English) | |
| Keyword(1) | shallaw water |
| Keyword(2) | sound propagation |
| Keyword(3) | asymptotic analysis |
| Keyword(4) | complex ray |
| Keyword(5) | lateral wave |
| 1st Author's Name | Toyohiko ISHIHARA |
| 1st Author's Affiliation | Department of Communication Engineering, National Defense Academy() |
| 2nd Author's Name | Kouji OHSHIMA |
| 2nd Author's Affiliation | Japan Maritime Self-Defense Force |
| 3rd Author's Name | Zengo TANAKA |
| 3rd Author's Affiliation | Department of Communication Engineering, National Defense Academy |
| Date | 2000/8/25 |
| Paper # | US2000-38 |
| Volume (vol) | vol.100 |
| Number (no) | 276 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |