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Proceedings Paper

A robotic reproduction of the dynamic sonar sensing in Horseshoe bats
Author(s): Brandon Goodman; Rebecca Castro; Yanqing Fu; Rolf Mueller; Michael Philen
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Paper Abstract

Horseshoe bats (family Rhinolophidae) are a group of bats with a particularly sophisticated biosonar system that allows them to navigate and pursue prey in dense and complex living areas. One conspicuous feature of horseshoe bat biosonar is that the pulses are emitted nasally and diffracted by a special baffle structure - the noseleaf - as the exit into the free field. Furthermore, the noseleaves can change their shapes while diffracting the outgoing ultrasonic waves. The aim of this research project is to determine the relationship between the deformation of the noseleaf during pulse emission and the ultrasonic field through experiments. 3D models of horseshoe bat noseleaf were obtained by tomographic imaging, reconstructed, and modified in the digital domain to meet the needs of additive manufacturing prototypes for an experimental setup. A data acquisition and instrument control system was developed and integrated with ultrasonic transducers to characterize the dynamic emission system acoustically, actuators for displacing the lower and top portion of bat noseleaf, and pan-tilt unit for orienting the noseleaf. A cone and tube waveguide was designed to match the loudspeaker to the nostrils of bat noseleaf. By using this system, it was possible to reproduce the dynamic effect of the noseleaf and characterize it as a basis for inspired dynamic acoustic devices. Future research will address the relationship between the deformations of the noseleaf and the acoustic field.

Paper Details

Date Published: 10 April 2014
PDF: 5 pages
Proc. SPIE 9061, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2014, 90614B (10 April 2014); doi: 10.1117/12.2052745
Show Author Affiliations
Brandon Goodman, Hampton Univ. (United States)
Rebecca Castro, Hampton Univ. (United States)
Yanqing Fu, Virginia Polytechnic Institute and State Univ. (United States)
Rolf Mueller, Virginia Polytechnic Institute and State Univ. (United States)
Michael Philen, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 9061:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2014
Jerome P. Lynch; Kon-Well Wang; Hoon Sohn, Editor(s)

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