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Paper Abstract and Keywords
Presentation 2013-11-23 13:30
Sonar strategy of wild echolocating bats (Pipistrellus abramus) during foraging flight in the field -- Analysis of 3-D flight trajectory and pulse direction measured by a microphone array system --
Shotaro Watanabe, Miwa Sumiya (Doshisha Univ.), Emyo Fujioka (FIRST/Univ. of Tokyo), Ikkyu Aihara (RIKEN), Yoshiaki Watanabe, Hiroshi Riquimaroux, Tetsuo Ohta, Shizuko Hiryu (Doshisha Univ.) US2013-69
Abstract (in Japanese) (See Japanese page) 
(in English) Pulse direction and flight trajectory of FM echolocating bats (Pipistrellus abramus) during natural foraging were measured by 32ch microphone array system in order to investigate their sonar strategy during foraging. As a result, the bat in the field mainly pointed their pulses’ direction toward their flight direction, but also emitted sounds in other one or two particular directions during target search. During target approach, acoustic characteristics of the pulse was changed in response to the distance to the target, suggesting the possibility of echo-intensity compensation during foraging. We suggest that by changing direction of the pulse, the wild bats expand the search area to improve the detection probability of preys.
Keyword (in Japanese) (See Japanese page) 
(in English) Bio-sonar / Echolocation / Japanese house bat / Field measurement / Sonar beam pattern / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 317, US2013-69, pp. 7-12, Nov. 2013.
Paper # US2013-69 
Date of Issue 2013-11-16 (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 2013-11-23 - 2013-11-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Kambaikan, Doshisha Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Underwater Acoustics, General(Co-Organization:The Marine Acoustics Society of Japan) 
Paper Information
Registration To US 
Conference Code 2013-11-US 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Sonar strategy of wild echolocating bats (Pipistrellus abramus) during foraging flight in the field 
Sub Title (in English) Analysis of 3-D flight trajectory and pulse direction measured by a microphone array system 
Keyword(1) Bio-sonar  
Keyword(2) Echolocation  
Keyword(3) Japanese house bat  
Keyword(4) Field measurement  
Keyword(5) Sonar beam pattern  
1st Author's Name Shotaro Watanabe  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Miwa Sumiya  
2nd Author's Affiliation Doshisha University (Doshisha Univ.)
3rd Author's Name Emyo Fujioka  
3rd Author's Affiliation JST,FIRST/the University of Tokyo (FIRST/Univ. of Tokyo)
4th Author's Name Ikkyu Aihara  
4th Author's Affiliation RIKEN (RIKEN)
5th Author's Name Yoshiaki Watanabe  
5th Author's Affiliation Doshisha University/Neurosensing and Bionavigation Research Center,Doshisha University (Doshisha Univ.)
6th Author's Name Hiroshi Riquimaroux  
6th Author's Affiliation Doshisha University (Doshisha Univ.)
7th Author's Name Tetsuo Ohta  
7th Author's Affiliation Doshisha University (Doshisha Univ.)
8th Author's Name Shizuko Hiryu  
8th Author's Affiliation Doshisha University (Doshisha Univ.)
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Speaker Author-1 
Date Time 2013-11-23 13:30:00 
Presentation Time 30 minutes 
Registration for US 
Paper # US2013-69 
Volume (vol) vol.113 
Number (no) no.317 
Page pp.7-12 
Date of Issue 2013-11-16 (US) 

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