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Paper Abstract and Keywords
Presentation 2011-01-21 10:15
Characteristics of ultrasonic echolocation pulse of FM bats (Pipistrellus abramus) in a cluttered environment
Toshiya Takenaga, Yukako Kagami, Emyo Fujioka, Shizuko Hiryu, Hiroshi Riquimaroux, Yoshiaki Watanabe (Doshisha Univ.) US2010-104 EA2010-117
Abstract (in Japanese) (See Japanese page) 
(in English) Changes in the terminal frequency (TF; the end frequency of downward FM sweep) of echolocation pulses were investigated by using Telemike for two FM bat species (Pipistrellus abramus and Miniopterus fuliginosus) in a cluttered environment. P. abramus emitted pulses in pairs (strobe group) with 20-40 ms interpulse intervals (IPIs), which occasionally created pulse-echo ambiguity. When overlap occurred, variation of the $ \delta $F was significantly increased to 5-6 kHz (F-test, P < 0.001). On the other hand, M. fuliginosus never emitted pulses in a strobe group. Since IPIs were always adjusted to be longer than ESD, echo streams were not overlapped. These comparative results indicate that by shifting TF within successive pulses, P. abramus separate between their own echo streams to avoid pulse-echo ambiguity. Our findings also suggest that echolocation strategy in the cluttered environment may be different between bat species.
Keyword (in Japanese) (See Japanese page) 
(in English) Miniopterus fuliginosus / Cluttered echo / Terminal frequency / Telemike / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 366, US2010-104, pp. 71-76, Jan. 2011.
Paper # US2010-104 
Date of Issue 2011-01-13 (US, EA) 
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 EA US  
Conference Date 2011-01-20 - 2011-01-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Doshisha Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics,and Related Topics 
Paper Information
Registration To US 
Conference Code 2011-01-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Characteristics of ultrasonic echolocation pulse of FM bats (Pipistrellus abramus) in a cluttered environment 
Sub Title (in English)  
Keyword(1) Miniopterus fuliginosus  
Keyword(2) Cluttered echo  
Keyword(3) Terminal frequency  
Keyword(4) Telemike  
1st Author's Name Toshiya Takenaga  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Yukako Kagami  
2nd Author's Affiliation Doshisha University (Doshisha Univ.)
3rd Author's Name Emyo Fujioka  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
4th Author's Name Shizuko Hiryu  
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 2011-01-21 10:15:00 
Presentation Time 30 minutes 
Registration for US 
Paper # US2010-104, EA2010-117 
Volume (vol) vol.110 
Number (no) no.366(US), no.367(EA) 
Page pp.71-76 
Date of Issue 2011-01-13 (US, EA) 

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