Modeling cochlear two-tone suppression using a system of nonlinear oscillators with feed-forward coupling

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Author(s)

    • Ouchi Masanori
    • Department of Systems and Control Engineering, Tokyo Institute of Technology
    • Nakao Hiroya
    • Department of Systems and Control Engineering, Tokyo Institute of Technology

Abstract

<p>Mechanism of two-tone suppression is studied using a coupled-oscillator model of the cochlea with feed-forward coupling. Local amplification of sound signals is modeled by using Stuart-Landau oscillators near the Hopf bifurcation, and transmission of sound signals is described as feed-forward coupling between the oscillators. Effect of suppressor signals on the response to probe signals is analyzed by numerical simulations. It is found that the effect of suppression is qualitatively different depending on relative frequency between probe and suppressor signals. By analyzing a simplified two-oscillator model, we explain the mechanism of the suppression, where configuration of the oscillators plays an essential role.</p>

Journal

  • Nonlinear Theory and Its Applications, IEICE

    Nonlinear Theory and Its Applications, IEICE 10(1), 90-99, 2019

    The Institute of Electronics, Information and Communication Engineers

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