Special acoustical role of pinna simplifying spatial target localization by the brown long-eared bat Plecotus auritus.

Physical Review. E
Xin MaWeidong Zhou

Abstract

Echolocating bats locate a target by sonar. The performance of this system is related to the shape of the binaural conformation in bats. From numerical predictions, it was found that in a central frequency band, the orientation of a strong sidelobe is shifted nearly linearly in the vertical direction. Inspired by this, the authors built an accurate wide-scope elevation estimation system by constructing a pair of erect artificial pinnae and realized simultaneous elevation and azimuth estimation by constructing a pair of orthogonal pinnae. By demonstrating the simplicity of spatial target echolocation, the authors showed that only two independent single-output neural networks were needed for either elevation or azimuth estimation. This method could be applied to imitate any other mammal species with similar pinna directivity patterns to facilitate and improve an artificial echolocation system.

References

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Nov 30, 2010·The Journal of the Acoustical Society of America·Roman Kuc
Sep 4, 2016·Current Opinion in Neurobiology·Melville J WohlgemuthCynthia F Moss
Apr 30, 2017·Physical Review Letters·Rolf MüllerJohn R Buck
Aug 5, 2017·The Journal of Experimental Biology·Kathrin Kugler, Lutz Wiegrebe
May 3, 2019·The Journal of the Acoustical Society of America·Roman Kuc
Dec 20, 2019·PLoS Computational Biology·Carl Bou MansourDieter Vanderelst

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