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| Presentation | 2011-08-30 13:55 A Basic Study of Classification Method of Target Scattering for Ambient Noise Imaging with Acoustic Lens Kazuyoshi Mori, Hanako Ogasawara, Toshiaki Nakamura (NDA), Takenobu Tsuchiya, Nobuyuki Endoh (Kanagawa Univ.)  US2011-42 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | We designed and made an aspherical lens with an aperture diameter of 1.0 m for Ambient Noise Imaging. It was expected that this acoustic lens realizes directional resolution, which is a beam width of 1 degree at the center frequency of 120 kHz over the field of view from -7 to +7 degrees. The prototype system was developed to arrange the hydrophone array on the focal plane of this lens, and was deployed on the barge ‘OKI SEATEC II’ moored in Uchiura Bay on November, 2010. Here, the silent target detection trial was conducted under only ocean natural ambient noise, which was mainly generated by snapping shrimps. The received signals were classified roughly into silent periods and pulses. Additionally, the pulses were consisted with target scatterings converged through the lens and biological noises directly received by the hydrophone array without the lens. In this study, we proposed a classification method to extract the target scatterings from the received signals. The preliminary data analysis results as of this writing shows that a target image is successfully detected. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Ambient Noise Imaging / Acoustic Lens / Target Scattering / Classification / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 191, US2011-42, pp. 5-10, Aug. 2011. | |
| Paper # | US2011-42 | |
| Date of Issue | 2011-08-23 (US) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | US2011-42 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2011-08-30 - 2011-08-30 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | NRIFE |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | US |
| Conference Code | 2011-08-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Basic Study of Classification Method of Target Scattering for Ambient Noise Imaging with Acoustic Lens |
| Sub Title (in English) | |
| Keyword(1) | Ambient Noise Imaging |
| Keyword(2) | Acoustic Lens |
| Keyword(3) | Target Scattering |
| Keyword(4) | Classification |
| Keyword(5) | |
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| 1st Author's Name | Kazuyoshi Mori |
| 1st Author's Affiliation | National Defense Academy (NDA) |
| 2nd Author's Name | Hanako Ogasawara |
| 2nd Author's Affiliation | National Defense Academy (NDA) |
| 3rd Author's Name | Toshiaki Nakamura |
| 3rd Author's Affiliation | National Defense Academy (NDA) |
| 4th Author's Name | Takenobu Tsuchiya |
| 4th Author's Affiliation | Kanagawa University (Kanagawa Univ.) |
| 5th Author's Name | Nobuyuki Endoh |
| 5th Author's Affiliation | Kanagawa University (Kanagawa Univ.) |
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| Speaker | Author-1 |
| Date Time | 2011-08-30 13:55:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2011-42 |
| Volume (vol) | vol.111 |
| Number (no) | no.191 |
| Page | pp.5-10 |
| #Pages | 6 |
| Date of Issue | 2011-08-23 (US) |
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