USING BAT AUDITORY MODELLING FOR OBJECT DISCRIMINATION AND ECHO SEPARATION TASKS

Dragana Nikolić, Timos Papadopoulos, Robert Allen

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.

References

  1. Glasberg, B. R., and Moore, B. C. J., 1990. Derivation of auditory filter shapes from notched noise data. Hearing Research, 47(1-2), pp. 103-138.
  2. Kick, S. A. and Simmons, J. A., 1984. Automatic gain control in the bat's sonar receiver and the neuroethology of echolocation. J. Neurosci. 4, pp. 2725-2737.
  3. Neretti, N., Sanderson, M. I., Intrator, N., and Simmons, J.A., 2003. Time-frequency model for echo-delay resolution in wideband biosonar. Journal of Acoustic Society of America, 113(4), pp. 2137-2145.
  4. Papadopoulos, T. and Allen, R., 2007. Experimental method for the acoustical modelling of the echolocation process in bats. Proceedings of the Institute of Acoustics, 29(3)
  5. Patterson, R. D., Robinson, K., Holdsworth, J., Mckeown, D., Zhang, C., and Allerhand, M. H., 1992. Complex sounds and auditory images, Auditory Physiology and Perception, (Eds.) Cazals, Y., Demany, L., Horner. K., Pergamon, Oxford.
  6. Saillant, P. A., Simmons, J. A., and Dear, S. P., 1993. A Computational Model of Echo Processing and Acoustic Imaging in Frequency-Modulated Echolocating Bats - the Spectrogram Correlation and Transformation Receiver. Journal of Acoustic Society of America, 94(5), pp. 2691-2712.
  7. Simmons, J. A., Saillant, P.A., Wotton, J.M., Haresign, T., Ferragamo, M.J., Moss, C.F., 1995. Composition of biosonar images for target recognition by echolocating bats. Neural Networks, 8(7-8), pp. 1239-1261.
  8. Slaney, M., 1993. An Efficient Implementation of the Patterson-Holdsworth Auditory Filter Bank, Apple Computer Technical Report 35, Perception GroupAdvanced Technology Group (1993).
  9. Svensson, U.P., Fred, R.I., and Vanderkooy, J., 1999. An analytic secondary source model of edge diffraction impulse responses. Journal of Acoustic Society of America, 106(5), pp. 2331-2344.
  10. Svensson, U.P. and Calamia, P.T., 2006. Edge-diffraction impulse responses near specular-zone and shadowzone boundaries. Acta Acustica United with Acustica, 92(4), pp. 501-512.
Download


Paper Citation


in Harvard Style

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 - Volume 1: BIOSIGNALS, (BIOSTEC 2010) ISBN 978-989-674-018-4, pages 300-305. DOI: 10.5220/0002748603000305


in Bibtex Style

@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 - Volume 1: BIOSIGNALS, (BIOSTEC 2010)},
year={2010},
pages={300-305},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002748603000305},
isbn={978-989-674-018-4},
}


in EndNote Style

TY - CONF
JO - Proceedings of the Third International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2010)
TI - USING BAT AUDITORY MODELLING FOR OBJECT DISCRIMINATION AND ECHO SEPARATION TASKS
SN - 978-989-674-018-4
AU - Nikolić D.
AU - Papadopoulos T.
AU - Allen R.
PY - 2010
SP - 300
EP - 305
DO - 10.5220/0002748603000305