NDLI: Bio-inspired sonar antennae: Enhancing directivity patterns for localization

Content Provider	IEEE Xplore Digital Library
Author	Schillebeeckx, F. De Mey, F. Peremans, H.
Copyright Year	2008
Description	Author affiliation: Dept. of MTT, Univ. of Antwerp, Antwerp (Peremans, H.) \|\| Dep. of Math. & Comp. Sci., Univ. of Antwerp, Antwerp (Schillebeeckx, F.; De Mey, F.)
Abstract	We present results of a biologically inspired method to enhance a sonar transducerpsilas directivity pattern for localization purposes. We show that an artificial pinna structure mounted over a transducer introduces features in its head related transfer function that are more interesting for localization than those in the basic piston-like directivity pattern of common ultrasonic transducers. We measured the directivity pattern of several transducer-pinna assemblies using a biologically inspired robotic bat head. We compare the measured head related transfer function of a larger (Oslash 10 mm) electromechanical film sensor with that of a much smaller commercially available electret condenser microphone, both with and without pinna. We investigate the added spatial filtering of a tragus or a ripple pattern in the pinna structure. We build monaural elevation template sets from the measured head related transfer functions and use an intertemplate distance metric to show that mounting a pinna structure over the receiving transducers makes these templates more suitable for localization.
Starting Page	366
Ending Page	371
File Size	820079
Page Count	6
File Format	PDF
ISBN	9781424428823
DOI	10.1109/BIOROB.2008.4762836
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ultrasonic transducers Robotic assembly Ultrasonic variables measurement Sonar measurements Transfer functions Robot sensing systems Biosensors Electromechanical sensors Electrets Microphones
Content Type	Text
Resource Type	Article

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