Entropy analysis of frequency and shape change in horseshoe bat biosonar

Physical Review. E
Anupam K GuptaRolf Müller

Abstract

Echolocating bats use ultrasonic pulses to collect information about their environments. Some of this information is encoded at the baffle structures-noseleaves (emission) and pinnae (reception)-that act as interfaces between the bats' biosonar systems and the external world. The baffle beam patterns encode the direction-dependent sensory information as a function of frequency and hence represent a view of the environment. To generate diverse views of the environment, the bats can vary beam patterns by changes to (1) the wavelengths of the pulses or (2) the baffle geometries. Here we compare the variability in sensory information encoded by just the use of frequency or baffle shape dynamics in horseshoe bats. For this, we use digital and physical prototypes of both noseleaf and pinnae. The beam patterns for all prototypes were either measured or numerically predicted. Entropy was used as a measure to compare variability as a measure of sensory information encoding capacity. It was found that new information was acquired as a result of shape dynamics. Furthermore, the overall variability available for information encoding was similar in the case of frequency or shape dynamics. Thus, shape dynamics allows the horseshoe bats to ge...Continue Reading

References

Jun 1, 1990·Scientific American·N Suga
Dec 1, 1970·The Journal of the Acoustical Society of America·G K Strother, M Mogus
Apr 1, 1997·The Journal of the Acoustical Society of America·B Tian, H U Schnitzler
May 1, 1997·The Journal of the Acoustical Society of America·J M Wotton, R L Jenison
Mar 21, 2008·Physical Review Letters·Rolf MüllerJohn R Buck
Jan 9, 2009·Proceedings. Biological Sciences·Annemarie SurlykkeLasse Jakobsen
Sep 8, 2010·The Journal of the Acoustical Society of America·Rolf Müller
May 11, 2012·PloS One·Lin FengRolf Müller
Nov 23, 2012·Nature·Lasse JakobsenAnnemarie Surlykke
May 11, 2013·Bioinspiration & Biomimetics·Mittu PannalaRolf Müller
Dec 3, 2015·The Journal of the Acoustical Society of America·Anupam K GuptaRolf Müller
Apr 30, 2017·Physical Review Letters·Rolf MüllerJohn R Buck
Nov 14, 2017·Bioinspiration & Biomimetics·Bryan D Todd, Rolf Müller

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Citations

Jun 5, 2019·Proceedings of the National Academy of Sciences of the United States of America·Xiaoyan Yin, Rolf Müller
Jun 18, 2019·Bioinspiration & Biomimetics·Luhui Yang, Rolf Müller
Sep 3, 2020·The Journal of the Acoustical Society of America·Liujun ZhangRolf Müller

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