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 |
Copyright and reproduction |
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