A novel cochlea partition model based on asynchronous bifurcation processor

Abstract

Abstract:The cochlea is a highly nonlinear biological sound processor the major components of which are lymph (viscous fluid), a basilar membrane (vibrating membrane in the viscous fluid), outer hair cells (active dumpers for the basilar membrane), inner hair cells (neural transducers), and spiral ganglion cells (parallel spikes density modulators). In this paper, a novel cochlea partition model based on a concept of an asynchronous bifurcation processor is presented. It is shown that the presented model can reproduce typical nonlinear responses of partitions of biological cochleae such as nonlinear DC response, nonlinear band-pass filtering, and adaptation. Also, FPGA experiments validate reproductions of these nonlinear responses.

A novel coupled ergodic sequential logic-based cochlear model: nonlinear hearing characteristics of two-tone responses and efficient hardware implementation

“…There have been various theoretical and circuit modeling studies on such nonlinear hearing characteristics, where their potential applications include cochlear implants . Among them, ergodic (or asynchronous) sequential logic (SL)-based cochlear models have been shown as much more hardware-efficient (e.g., consume fewer circuit elements and lower power) than ordinary differential equation (ODE)-based cochlear models [22][23][24][25][26][27][28][29][30]. In this paper, a novel hardware-efficient coupled ergodic SL-based cochlear model is presented.…”

A novel design of ergodic sequential logic cochlear single partition model: reproduction of nonlinear compression characteristics of mammalian cochlea and efficient implementation

“…A number of electronic circuits cochlear models have been designed with strong emphases on their applications to cochlear implants [17][18][19][20][21][22][23][24][25][26]. In addition, it has been shown that ergodic sequential logic (SL) biomimetic models are much more hardware-efficient (e.g., consume fewer circuit elements and lower power) compared to standard ordinary differential equation (ODE) biomimetic models [25][26][27][28][29][30]. The results in this paper will be useful in developing a small and low-power cochlear implant that can reproduce the nonlinear sound processing functions of the human cochlea.…”

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

“…It is considered that the cochlea can be modeled as an array of such active oscillators slightly below the onset of spontaneous oscillation, which are coupled mechanically and through the lymphatic fluid with high viscosity in the cochlear duct [8][9][10][11][12][13][14]. Development of biomimetic acoustic sensors that take into account the amplification characteristics of the cochlea has also been attempted [3,[15][16][17].…”