An integrated model of pitch perception incorporating place and temporal pitch codes with application to cochlear implant research.

Journal: Hearing research
PMID: 27845260

Abstract

Although the neural mechanisms underlying pitch perception are not yet fully understood, there is general agreement that place and temporal representations of pitch are both used by the auditory system. This paper describes a neural network model of pitch perception that integrates both codes of pitch and explores the contributions of, and the interactions between, the two representations in simulated pitch ranking trials in normal and cochlear implant hearing. The model can replicate various psychophysical observations including the perception of the missing fundamental pitch and sensitivity to pitch interval sizes. As a case study, the model was used to investigate the efficiency of pitch perception cues in a novel sound processing scheme, Stimulation based on Auditory Modelling (SAM), that aims to improve pitch perception in cochlear implant hearing. Results showed that enhancement of the pitch perception cues would lead to better pitch ranking scores in the integrated model only if the place and temporal pitch cues were consistent.

Authors

  • Nafise Erfanian Saeedi
    NeuroEngineering Laboratory, Dept. of Electrical & Electronic Engineering, University of Melbourne, Australia; Centre for Neural Engineering, University of Melbourne, Australia. Electronic address: n.erfaniansaeedi@student.unimelb.edu.au.
  • Peter J Blamey
    The Bionics Institute, East Melbourne, Australia; Dept. of Medical Bionics, University of Melbourne, Australia.
  • Anthony N Burkitt
    NeuroEngineering Laboratory, Dept. of Electrical & Electronic Engineering, University of Melbourne, Australia; The Bionics Institute, East Melbourne, Australia.
  • David B Grayden
    NeuroEngineering Laboratory, Department of Electrical & Electronic Engineering, The University of Melbourne, Melbourne, VIC, Australia, 3010; Centre for Neural Engineering, The University of Melbourne, Melbourne, VIC, Australia, 3010.

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