• Corpus ID: 235265770

Two hydrodynamic effects allow strongly nonlinear cochlear response with level-independent admittance

  title={Two hydrodynamic effects allow strongly nonlinear cochlear response with level-independent admittance},
  author={Renata Sisto and Daniele Belardinelli and Arturo Moleti},
This paper discusses the role of 2-D/3-D cochlear fluid hydrodynamics in the generation of the large nonlinear dynamical range of the basilar membrane (BM) and pressure response, in the decoupling between cochlear gain and tuning, and in the dynamic stabilization of the high-gain BM response in the peak region. The large and closely correlated dependence on stimulus level of the BM velocity and fluid pressure gain (Dong and Olson, 2013), is consistent with a physiologically-oriented… 

Figures and Tables from this paper


Linear cochlear mechanics.
  • G. Zweig
  • Physics, Medicine
    The Journal of the Acoustical Society of America
  • 2015
An active, three-dimensional, short-wavelength model of cochlear mechanics is derived from an older, one- dimensional, long-wa wavelength model containing time-delay forces, which behaves like a short- Wavelength model with instantaneous interactions.
Otoacoustic emissions in time-domain solutions of nonlinear non-local cochlear models.
In order to be able to use standard personal computers for simulations reliably, the discretized model has been carefully designed to enforce sparsity of the matrices using a multi-iterative approach.
Different models of the active cochlea, and how to implement them in the state-space formalism.
Different schematizations of the active term describing the behavior of the outer hair cell's feedback mechanism, including nonlinear and nonlocal dependences on either pressure or basilar membrane displacement, are discussed, showing their effect on some measurable cochlear properties.
Low-passed outer hair cell response and apical-basal transition in a nonlinear transmission-line cochlear model.
Low-pass filtering of an internal force term, derived from a physiologically plausible OHC schematization, is included in a simple one-dimensional (1-D) two-degrees-of-freedom transmission-line model and pressure focusing in the short-wave resonant region may help in acquiring the additional gain necessary to match the experimental data.
Constraints imposed by zero-crossing invariance on cochlear models with two mechanical degrees of freedom.
The locations of the poles and zeros of the BM admittance, calculated for a set of linear models in which the strength of the active force is progressively decreased, provides a playground for evaluating the behavior of a corresponding nonlinear model at increasing stimulus levels.
Power Dissipation in the Cochlea Can Enhance Frequency Selectivity
A computational model of the cochlea that incorporates viscous fluid dynamics, organ of Corti microstructural mechanics, and electrophysiology of the outer hair cells is developed and suggests that an appropriate dissipation can enhance the tuning quality by reducing the spread of energy provided by the outerhair cells’ somatic motility.
Cochlear Outer-Hair-Cell Power Generation and Viscous Fluid Loss
This work shows explicitly based on a three-dimensional box model of the mouse cochlea that OHC power output increases and saturates with SPL and predicts that the total power output from the three rows of OHCs can be over three orders of magnitude greater than the acoustic input power at 10 dB sound pressure level (SPL).
Detection of cochlear amplification and its activation.
These results are the most concrete evidence for cochlear power amplification to date and support OHC somatic forces as its source.
Cochlear Model with Three-Dimensional Fluid, Inner Sulcus and Feed-Forward Mechanism
A three-dimensional model of the guinea pig cochlea using the phase-integral method and basilar membrane response with the active feed-forward mechanism compares favorably with published experimental measurements.
Ranke revisited--a simple short-wave cochlear model.
  • W. Siebert
  • Mathematics, Medicine
    The Journal of the Acoustical Society of America
  • 1974
The phase characteristics of the theory show major deviations from the experiment—a failure which is believed to be due not to the short‐wave approximation per se, but rather to the basic physical simplifications common to virtually all cochlear theories.