Publication
Title
Evaluating three-dimensional localisation information generated by bio-inspired in-air sonar
Author
Abstract
This study aims to provide a better understanding of how bat bio-sonar operates so that the authors can apply this improved understanding to the design of simple in-air sonar systems based on the same operational principles. It focuses on the effect of component and configuration choices on the generated binaural spectral cues. Configurations composed of conventional receivers are evaluated for varying reflection strengths and compared to a system with artificial pinnae receivers. Localisation performance is quantified by an information-theoretic performance criterion expressing the mutual information carried by a binaural spectrum on the corresponding three-dimensional reflector location. Results show that the narrow beamwidth of conventional transducers limits the localisation information carried by the generated binaural spectra. The more complex spatial sensitivity patterns of organic pinna forms such as that of the Phyllostomus discolor bat species are shown to provide additional spectral cues that greatly improve localisation information transfer. The authors have found that the varying acoustic axis in the head-related transfer function of the pinna has a positive effect, but that the higher peripheral sensitivity around the varying acoustic axis is the driving force behind the artificial pinna's superior localisation performance.
Language
English
Source (journal)
IET radar, sonar and navigation. - London
Publication
London : 2012
ISSN
1751-8784
Volume/pages
6:6(2012), p. 516-525
ISI
000306073400013
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
[E?say:metaLocaldata.cgzprojectinf]
ChiRoPing - Developing Versatile and Robust Perception using Sonar Systems that Ingegrate Active Sensing, Morphology and Behaviour.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 20.07.2012
Last edited 22.09.2017
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