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We recently proposed a "loop dissection" approach to identify the components of the active feedback loop leading to cochlear amplification. The approach involves breaking the closed feedback loop at the sensor and actuator and estimating two frequency transfer functions: the system transfer function, which is the ratio of the sensor output response to actuator input in open loop; and the feedback gain, which is the ratio of the actuator output response to sensor input in open loop. In our prior study, the approach was applied on a local lumped model of the cochlear cross section which provided significant insights but did not include the global coupling in the cochlea. In the current study, we applied the loop dissection approach on the mechanical-electrical-acoustic global finite element model of cochlea. Findings of this study will be discussed in this presentation.
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