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Paper Abstract and Keywords
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
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
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)
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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  
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 
Date of Issue 2011-11-17 (US) 

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