Azimuthal Sound Localisation with Electronic Lateral Superior Olive

  • Anu AggarwalEmail author
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 517)


Since the lateral superior olive (LSO) is the first nucleus in the auditory pathway where binaural inputs converge, it is thought to be involved in azimuthal localization of sounds by calculating the interaural level difference (ILD). The electronic LSO can be used for azimuthal localization in robotics. Thus, in this paper we demonstrate the design, fabrication and test results from a silicon chip which performs azimuthal localization based on the Reed and Blum’s model of the population response of the LSO in brain.


Azimuthal localization ILDci LSO Reed & Blum’s model 


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  1. 1.
    Purves, D., Augustine, G.J., Fitzpatrick, D., Hall, W.C., LaMantia, A.S., White, L.E.: Neuroscience. Sinauer Associates, Sunderland (2012)Google Scholar
  2. 2.
    Reed, M.C.: Blum., J. J: A model for the computation and encoding of azimuthal information by the lateral superior olive. J. Acoust. Soc. Am 88(3), 1442–1453 (1990)CrossRefGoogle Scholar
  3. 3.
    Horiuchi, T., Hynna, K.: Spike based VLSI modelling of the ILD system in echolocating bat. Neural Networks 14, 755–762 (2001)CrossRefGoogle Scholar
  4. 4.
    Shi, R.Z., Horiuchi, T.K.: A neuromorphic VLSI model of bat interaural level difference processing for azimuthal echolocation. IEEE Transactions on Circuits and Systems I 54(1), 74–88 (2007)CrossRefGoogle Scholar
  5. 5.
    Horiuchi, T.K., Cheely, M.: A systems view of a neuromorphic VLSI echolocation system. In: IEEE International Symposium on Circuits and Systems, pp. 605–608 (2007)Google Scholar
  6. 6.
    Abdalla, H.A.N.: Estimation of elevation and Azimuth in a neuromorphic VLSI bat echolocation system. (unpublished) Ph.D. Thesis (2009)Google Scholar
  7. 7.
    Park, T.J., Grothe, B., Pollak, G.D., Koch, U.: Neural delays shape selectivity to inter aural intensity differences in the Lateral Superior Olive. J. Neurosci. 16(20), 6554–6556 (1996)Google Scholar
  8. 8.
    Schnupp, J.W.H., Carr, C.: On hearing with more than one ear: lessons from evolution. Nature Neuroscience 12(6), 692–697 (2009)CrossRefGoogle Scholar
  9. 9.
    Zacksenhouse, M., Johnson, D.H., Williams, J., Tsuchitani, C.: Single neuron modelling of LSO unit responses. J. Neurophysiol. 79, 3098–3110 (1998)Google Scholar
  10. 10.
    Horiuchi, T.K., Bansal, C., Massoud, T.M.: Binaural intensity comparison in the echolocating bat using synaptic conductance. In: IEEE International Symposium on Circuits and Systems, TWN Taipei, pp. 2153–2156 (2009)Google Scholar
  11. 11.
    Aggarwal, A., Horiuchi, T.K.: Neuromorphic VLSI second order synapse. The Electronics Letters 51(4), 319–321 (2015)CrossRefGoogle Scholar
  12. 12.
    Boahen, K.A.: Communicating Neuronal Ensembles between Neuromorphic Chips. Neuromorphic Systems Engineering. The Springer International Series in Engineering and Computer. Science 447, 229–259 (1998)Google Scholar
  13. 13.
    Cadence PSPICE simulator, SPB_16.3.
  14. 14.
    MATLAB R2011b.
  15. 15.

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.University of MarylandCollege ParkUSA

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