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| Presentation | 2011-11-24 15:00 Active sonar strategy for a moving target by CF-FM echolocating bats -- Measurements of direction and directivity of ultrasonic pulse emitted by the bat during intercepting a fluttering moth -- Naohiro Matsuta, Yuki Kinoshita, Shizuko Hiryu, Tetsuo Ohta, Hiroshi Riquimaroux, Yoshiaki Watanabe (Doshisha Univ.)  US2011-72 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | We measured both direction and directivity of pulses emitted by CF-FM bats during intercepting to a fluttering moth in a chamber by using the microphone array system. In terminal phase (target distance < 1 m) , the bat was found to expand beam width of tFM component of echolocation pulse from approximately ± 20 - 30°; up to ± 45°; horizontally, and from approximately ± 10 - 20°; up to ± 45°; vertically. We suggest that the bats adjusted beam width to retain moving target in spatial window of echolocation at final stage of capturing. In addition, the returning echo from the fluttering moth was measured by emitting CF pulse from ultrasonic loudspeaker. Echo level of the fluttering moth was changed by the incident angle of the sounds. When approaching to two fluttering moths, the bat chose the moth which returned stronger echo level. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Rhinolophus ferrmequinum nippon / Microphone array system / Telemike / Goniocraspidum pryeri / Echo level / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 311, US2011-72, pp. 37-42, Nov. 2011. | |
| Paper # | US2011-72 | |
| Date of Issue | 2011-11-17 (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 | US2011-72 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2011-11-24 - 2011-11-24 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokai Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | General |
| Paper Information | |
| Registration To | US |
| Conference Code | 2011-11-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Active sonar strategy for a moving target by CF-FM echolocating bats |
| Sub Title (in English) | Measurements of direction and directivity of ultrasonic pulse emitted by the bat during intercepting a fluttering moth |
| Keyword(1) | Rhinolophus ferrmequinum nippon |
| Keyword(2) | Microphone array system |
| Keyword(3) | Telemike |
| Keyword(4) | Goniocraspidum pryeri |
| Keyword(5) | Echo level |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Naohiro Matsuta |
| 1st Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 2nd Author's Name | Yuki Kinoshita |
| 2nd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 3rd Author's Name | Shizuko Hiryu |
| 3rd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 4th Author's Name | Tetsuo Ohta |
| 4th Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 5th Author's Name | Hiroshi Riquimaroux |
| 5th Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 6th Author's Name | Yoshiaki Watanabe |
| 6th Author's Affiliation | Doshisha University (Doshisha Univ.) |
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| Speaker | Author-1 |
| Date Time | 2011-11-24 15:00:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2011-72 |
| Volume (vol) | vol.111 |
| Number (no) | no.311 |
| Page | pp.37-42 |
| #Pages | 6 |
| Date of Issue | 2011-11-17 (US) |
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