{"data":[{"source":"bio.acousti.ca","id":"47814","type":"article","title":"Three-dimensional sonar beam-width expansion by Japanese house bats ( Pipistrellus abramus ) during natural foraging","author":"Motoi, Kazuya; Sumiya, Miwa; Fujioka, Emyo; Hiryu, Shizuko","editor":null,"year":"2017","month":null,"journal":"The Journal of the Acoustical Society of America","booktitle":null,"series":null,"howpublished":null,"volume":"141","number":"5","pages":"EL439 - EL444","chapter":null,"edition":null,"publisher":null,"organization":null,"institution":null,"school":null,"address":null,"type_of_work":null,"note":null,"isbn":null,"issn":"0001-4966","doi":"10.1121\/1.4981934","url":"http:\/\/asa.scitation.org\/doi\/10.1121\/1.4981934","attachments":"https:\/\/bio.acousti.ca\/sites\/default\/files\/1%252E4981934.pdf","keywords":null,"abstract":"Three-dimensional directivity patterns of sonar sounds emitted by Japanese house bats (Pipistrellus abramus) during natural foraging were measured by a 44-channel microphone array. Just before prey capture, the terminal frequency (TF) of emitted sounds decreased, and the beam width (mean \u00b1 standard deviation) expanded from 40 \u00b1 10\u00b0 to 63 \u00b1 9\u00b0 (horizontal) and from 32 \u00b1 10\u00b0 to 52 \u00b1 7\u00b0 (vertical). P. abramus decrease the TF to simultaneously expand the beam width in both the horizontal and vertical planes, while retaining the target within the three-dimensional acoustic field of view at the final stage of capture.","type_name":"Journal Article","journal_abbreviation":"The Journal of the Acoustical Society of America","pmid":null,"info_url":"https:\/\/bio.acousti.ca\/node\/47814"}]}