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Authors: Dragana Nikolić ; Timos Papadopoulos and Robert Allen

Affiliation: Institute of Sound and Vibration Research, University of Southampton, United Kingdom

Keyword(s): Bat echolocation, Acoustics modelling, Echo separation, Object discrimination.

Related Ontology Subjects/Areas/Topics: Acoustic Signal Processing ; Biomedical Engineering ; Biomedical Signal Processing

Abstract: This paper proposes a computational echolocation model that can be used for discrimi¬na¬tion of the specific target object and reconstruction of the acoustic information from multiple overlapping echoes returning back from that target. An acoustic model for estimation of the backscattering impulse responses of a rigid disk has been developed and employed in order to simulate reflection and scattering of FM signal from the disk surface and edges. By rotating the disk around its central axis reflected echo patterns from its edges change allowing for small time variation between arrivals of each individual echo component. This repre¬sents the scenario of a flying insect where the distances from the bat to the insect’s head, body and wings are slightly different with each returning a contribution to the overall echo. The echolocation signal obtained from the rotating disk is further encoded into the spectrogram-like format characteristic for the mammalian auditory system. The simulation results presented in this paper demonstrate that the proposed model is able to distinguish between overlapping echoes from the spectro¬gram-like forms of the echolocation signals. (More)

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Paper citation in several formats:
Nikolić, D.; Papadopoulos, T. and Allen, R. (2010). USING BAT AUDITORY MODELLING FOR OBJECT DISCRIMINATION AND ECHO SEPARATION TASKS. In Proceedings of the Third International Conference on Bio-inspired Systems and Signal Processing (BIOSTEC 2010) - BIOSIGNALS; ISBN 978-989-674-018-4; ISSN 2184-4305, SciTePress, pages 300-305. DOI: 10.5220/0002748603000305

@conference{biosignals10,
author={Dragana Nikolić. and Timos Papadopoulos. and Robert Allen.},
title={USING BAT AUDITORY MODELLING FOR OBJECT DISCRIMINATION AND ECHO SEPARATION TASKS},
booktitle={Proceedings of the Third International Conference on Bio-inspired Systems and Signal Processing (BIOSTEC 2010) - BIOSIGNALS},
year={2010},
pages={300-305},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002748603000305},
isbn={978-989-674-018-4},
issn={2184-4305},
}

TY - CONF

JO - Proceedings of the Third International Conference on Bio-inspired Systems and Signal Processing (BIOSTEC 2010) - BIOSIGNALS
TI - USING BAT AUDITORY MODELLING FOR OBJECT DISCRIMINATION AND ECHO SEPARATION TASKS
SN - 978-989-674-018-4
IS - 2184-4305
AU - Nikolić, D.
AU - Papadopoulos, T.
AU - Allen, R.
PY - 2010
SP - 300
EP - 305
DO - 10.5220/0002748603000305
PB - SciTePress

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