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A Duplex Theory of Spike Coding in the Early Stages of the Auditory System

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3 Author(s)
Ismail Uysal ; Computational NeuroEngineering Laboratory, University of Florida, Gainesville, FL. ismail@cnel.ufl.edu ; Harsha Sathyendra ; John G. Harris

We propose a duplex theory of spike coding in the early stages of the auditory system based on the intensity and noise levels of the acoustic stimuli. According to this concept, at low intensity levels, where auditory nerve firings cannot generate a high enough synchrony among neuron ensembles, rate coding is more likely favored against phase-locking via synchrony coding. To the contrary, at conversational intensity levels, phase synchrony coding is preferred due to its superior and highly noise robust performance. The theory is supported by both evidence from biology, as well as from experimental simulations using biologically plausible models of the entire processing chain from spike generation to recognition

Published in:

2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07  (Volume:4 )

Date of Conference:

15-20 April 2007