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A Functional Role of FM Sweep Rate of Biosonar in Echolocation of Bat

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Neural Information Processing (ICONIP 2004)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 3316))

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Abstract

Most species of bats making echolocation use frequency modulated(FM) ultrasonic pulses to measure the distance to targets.These bats detect with a high accuracy the arrival time differences between emitted pulses and their echoes generated by targets. In order to clarify the neural mechanism for echolocation, we present neural model of inferior colliculus(IC). The bats increase the downward frequency sweep rate of emitted FM pulse as they approach the target. The functional role of this modulation of sweep rate is not yet clear. In order to investigate the role, we calculated the response properties of our models of IC changing the target distance and the sweep rate. We found based on the simulations that the distance of a target in various ranges may be encoded the most clearly into the activity pattern of delay time map network in IC, when bats adopt the observed FM sweep rate for each range of target distance.

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Author information

Authors and Affiliations

  1. Department of Information Network Science, School of Information Systems, University of Electro-Communications, Chofu, Tokyo, 182-8585, Japan

    Kazuhisa Fujita, Eigo Kamata, Yoshiki Kashimori & Takeshi Kambara

  2. Department of Computer Science, Faculty of Engineering, Saitama Institute of Technology, Okabe, Saitama, 369-0293, Japan

    Satoru Inoue

  3. Department of Applied Physics and Chemistry, University of Electro-Communications, Chofu, Tokyo, 182-8585, Japan

    Yoshiki Kashimori & Takeshi Kambara

Authors
  1. Kazuhisa Fujita
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  2. Eigo Kamata
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  3. Satoru Inoue
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  4. Yoshiki Kashimori
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  5. Takeshi Kambara
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Editor information

Editors and Affiliations

  1. Indian Statistical Institute, Electronics and Communication Sciences Unit, Kolkata, India

    Nikhil Ranjan Pal

  2. School of Computer and Information Sciences, Knowledge Engineering and Discovery Research Institute (KEDRI), Auckland University of Technology, Private Bag 92006, Auckland, New Zealand

    Nik Kasabov

  3. Department of Instrumentation and Electronics Engineering, Jadavpur University, Salt-lake Campus, 700098, Calcutta, India

    Rajani K. Mudi

  4. Indian Statistical Institute, 203 B. T. Road, 700 108, Calcutta,  

    Srimanta Pal

  5. Indian Statistical Institute, Computer Vision and Pattern Recognition Unit, 700108, Kolkata, India

    Swapan Kumar Parui

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© 2004 Springer-Verlag Berlin Heidelberg

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Fujita, K., Kamata, E., Inoue, S., Kashimori, Y., Kambara, T. (2004). A Functional Role of FM Sweep Rate of Biosonar in Echolocation of Bat. In: Pal, N.R., Kasabov, N., Mudi, R.K., Pal, S., Parui, S.K. (eds) Neural Information Processing. ICONIP 2004. Lecture Notes in Computer Science, vol 3316. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-30499-9_11

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  • DOI: https://doi.org/10.1007/978-3-540-30499-9_11

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-23931-4

  • Online ISBN: 978-3-540-30499-9

  • eBook Packages: Springer Book Archive

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