Eigenbeam analysis of the diversity in bat biosonar beampatterns

The Journal of the Acoustical Society of America
Philip Caspers, Rolf Müller

Abstract

A quantitative analysis of the interspecific variability in bat biosonar beampatterns has been carried out on 267 numerical predictions of emission and reception beampatterns from 98 different species. Since these beampatterns did not share a common orientation, an alignment was necessary to analyze the variability in the shape of the patterns. To achieve this, beampatterns were aligned using a pairwise optimization framework based on a rotation-dependent cost function. The sum of the p-norms between beam-gain functions across frequency served as a figure of merit. For a representative subset of the data, it was found that all pairwise beampattern alignments resulted in a unique global minimum. This minimum was found to be contained in a subset of all possible beampattern rotations that could be predicted by the overall beam orientation. Following alignment, the beampatterns were decomposed into principal components. The average beampattern consisted of a symmetric, positionally static single lobe that narrows and became progressively asymmetric with increasing frequency. The first three "eigenbeams" controlled the beam width of the beampattern across frequency while higher rank eigenbeams account for symmetry and lobe motion. ...Continue Reading

References

Sep 1, 1995·The Journal of the Acoustical Society of America·J M WottonJ A Simmons
Jan 22, 2005·The Journal of the Acoustical Society of America·Murat AytekinCynthia F Moss
May 17, 2006·Trends in Ecology & Evolution·Gareth Jones, Emma C Teeling
Nov 27, 2007·Bioinspiration & Biomimetics·Rolf Müller, Roman Kuc
Mar 21, 2008·Physical Review Letters·Rolf MüllerJohn R Buck
Mar 12, 2010·Methods in Molecular Biology·Asa Ben-Hur, Jason Weston
Jul 8, 2010·The International Journal of Robotics Research·Anna YershovaJulie C Mitchell
Sep 8, 2010·The Journal of the Acoustical Society of America·Rolf Müller
May 11, 2011·Bioinspiration & Biomimetics·Jianguo Ma, Rolf Müller
Jan 1, 1991·Journal of Cognitive Neuroscience·M Turk, A Pentland
Jun 12, 2014·The Journal of the Acoustical Society of America·Mohammad Motamedi, Rolf Müller

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Citations

Mar 5, 2016·The Journal of the Acoustical Society of America·Uzair S Gilani, Rolf Müller
Nov 14, 2017·Bioinspiration & Biomimetics·Bryan D Todd, Rolf Müller
Jun 2, 2018·Bioinspiration & Biomimetics·Rolf MüllerJin-Ping Han
Oct 1, 2019·Bioinspiration & Biomimetics·Joseph Sutlive, Rolf Müller

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