BioAcoustica is a free, open repository of wildlife sound recordings from the Natural History Museum, London.
Taxonomic index of the BioAcoustica collection
Acoustic and biological measurements in the BioAcoustica collection
Recording annotations from ann-o-mate
The specimens that recordings are of, from the collections
Motoi, Kazuya; Sumiya, Miwa; Fujioka, Emyo; Hiryu, Shizuko (2017). Three-dimensional sonar beam-width expansion by Japanese house bats ( Pipistrellus abramus ) during natural foraging. The Journal of the Acoustical Society of America, 141(5): EL439 - EL444.
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 ± standard deviation) expanded from 40 ± 10° to 63 ± 9° (horizontal) and from 32 ± 10° to 52 ± 7° (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.
| Pipistrellus abramus |
Where the specimens that recordings are of were collected, not where the sound was recorded