| Presentation | 2003/8/22 Focused Acoustic Field of Time Reversal Waves Takuya SHIMURA, Yoshitaka WATANABE, Toshiaki KIKUCHI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Focusing property of time reversal waves (phase conjugate waves) in shallow water or deep sea has been discussed based on simulation of the normal mode method. In this study, the property of time reversal waves is verified through tank experiments and it is clarified that time reversal waves enable to converge waves to the focus and simulation results agree with the experimental results qualitatively. It is also investigated how the arrangement of TRA (Time Reversal Array) elements affects received signal at the focus. It turned out that the signal received at the focus is not destroyed even with TRA whose number of elements is reduced, that tilting of TRA during receiving and transmitting process degrades the convergence property while vertical fluctuation does not, and that even horizontal TRA can generate time reversal waves if it has enough length. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | underwater acoustics / time reversal / phase conjugate / tank experiments / shallow water / array arrangement |
| Paper # | US2003-36 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 2003/8/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Chair | |
| 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) | Focused Acoustic Field of Time Reversal Waves |
| Sub Title (in English) | |
| Keyword(1) | underwater acoustics |
| Keyword(2) | time reversal |
| Keyword(3) | phase conjugate |
| Keyword(4) | tank experiments |
| Keyword(5) | shallow water |
| Keyword(6) | array arrangement |
| 1st Author's Name | Takuya SHIMURA |
| 1st Author's Affiliation | Japan Marine Science and Technology Center() |
| 2nd Author's Name | Yoshitaka WATANABE |
| 2nd Author's Affiliation | Japan Marine Science and Technology Center |
| 3rd Author's Name | Toshiaki KIKUCHI |
| 3rd Author's Affiliation | Japan Marine Science and Technology Center |
| Date | 2003/8/22 |
| Paper # | US2003-36 |
| Volume (vol) | vol.103 |
| Number (no) | 277 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |