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| Presentation | 2021-06-18 15:20 Study of attention of bats by reproducing echoes using FDTD simulation. Yuta Hasegawa, Yu Teshima, Taku Kawamura, Takao Tsuchiya, Shizuko Hiryu (Doshisha Univ.)  US2021-13 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Bats use echolocation, in which they emit sounds and listen to their echoes, to achieve a high level of spatial perception in flight. In particular, bats that emit CF-FM type ultrasonic waves change the frequency of their pulses so that the frequency of the echoes to which they pay attention remains constant within the sensitive range of their auditory system (Doppler shift compensation behavior). Therefore, the identification of the target of the compensation behavior, which is a constant echo frequency, allow us to investigate the change in attention of bats. However, even in laboratory experiments using telemetry microphones, it is not possible to measure all the echoes reaching the bat in flight from the surrounding walls, and the echo information has not been analyzed well yet. In this study, we numerically reproduced the echoes including the Doppler effect received by bats during flight experiments by implementing a moving sound source in the two-dimensional finite-difference time-domain method (FDTD). From this, we estimated the target of compensation behavior where the echo is constant, and analyzed the change in attention of bats. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | bat / ultrasound / Doppler-shift compensation / FDTD / simulation / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 67, US2021-13, pp. 29-34, June 2021. | |
| Paper # | US2021-13 | |
| Date of Issue | 2021-06-11 (US) | |
| ISSN | 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 | US2021-13 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2021-06-18 - 2021-06-18 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | US |
| Conference Code | 2021-06-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study of attention of bats by reproducing echoes using FDTD simulation. |
| Sub Title (in English) | |
| Keyword(1) | bat |
| Keyword(2) | ultrasound |
| Keyword(3) | Doppler-shift compensation |
| Keyword(4) | FDTD |
| Keyword(5) | simulation |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Yuta Hasegawa |
| 1st Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 2nd Author's Name | Yu Teshima |
| 2nd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 3rd Author's Name | Taku Kawamura |
| 3rd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 4th Author's Name | Takao Tsuchiya |
| 4th Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 5th Author's Name | Shizuko Hiryu |
| 5th Author's Affiliation | Doshisha University (Doshisha Univ.) |
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| Speaker | Author-1 |
| Date Time | 2021-06-18 15:20:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2021-13 |
| Volume (vol) | vol.121 |
| Number (no) | no.67 |
| Page | pp.29-34 |
| #Pages | 6 |
| Date of Issue | 2021-06-11 (US) |
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