Coherent reflection in a two-dimensional cochlea: Short-wave versus long-wave scattering in the generation of reflection-source otoacoustic emissions.
@article{Shera2005CoherentRI,
title={Coherent reflection in a two-dimensional cochlea: Short-wave versus long-wave scattering in the generation of reflection-source otoacoustic emissions.},
author={Christopher A. Shera and Arnold Tubis and Carrick L. Talmadge},
journal={The Journal of the Acoustical Society of America},
year={2005},
volume={118 1},
pages={
287-313
}
}The theory of coherent reflection filtering explains the empirical form of the cochlear reflectance by showing how it emerges from the coherent "backscattering" of forward-traveling waves by impedance perturbations in the mechanics of the cochlear partition. Since the theory was developed using the one-dimensional (1-D) transmission-line model of the cochlea, an obvious logical shortcoming is the failure of the long-wavelength approximation near the peak of the traveling wave, where coherent…
Figures and Tables from this paper
78 Citations
Wave propagation patterns in a "classical" three-dimensional model of the cochlea.
- PhysicsThe Journal of the Acoustical Society of America
- 2007
Two unusual excitation methods are applied to a three-dimensional stylized classical nonlinear model of the cochlea, constructed on the basis of data from an experimental animal selected to yield a smooth basilar-membrane impedance function.
Distortion products and backward-traveling waves in nonlinear active models of the cochlea.
- PhysicsThe Journal of the Acoustical Society of America
- 2011
The phenomenology of distortion products in nonlinear cochlear models, predicting their amplitude and phase along the basilar membrane and the effect of different modeling choices is analyzed, including feed-forward asymmetry, micromechanical roughness, and breaking of scaling symmetry.
Transmission of cochlear distortion products as slow waves: a comparison of experimental and model data.
- PhysicsThe Journal of the Acoustical Society of America
- 2012
Ren with co-workers have addressed this topic experimentally by measuring the spatial vibration pattern of the basilar membrane in response to two tones of frequency f(1) and f(2) and shown that their phase data is actually in accordance with the slow-wave hypothesis.
Forward- and Reverse-Traveling Waves in DP Phenomenology: Does Inverted Direction of Wave Propagation Occur in Classical Models?
- PhysicsAIP conference proceedings
- 2011
The DP phase is calculated in a classical cochlear model and it is concluded that deviations from the classical model are not necessary to account for the observed phase behavior.
Linear cochlear mechanics.
- PhysicsThe 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.
Testing coherent reflection in chinchilla: Auditory-nerve responses predict stimulus-frequency emissions.
- PhysicsThe Journal of the Acoustical Society of America
- 2008
The compelling overall agreement between measured and predicted delays suggests that the coherent-reflection model captures the dominant mechanisms responsible for the generation of reflection-source otoacoustic emissions.
Do Forward- and Backward-Traveling Waves Occur Within the Cochlea? Countering the Critique of Nobili et al.
- PhysicsJournal of the Association for Research in Otolaryngology
- 2004
It is demonstrated that the one-dimensional wave-equation formulation of cochlear hydrodynamics does not misrepresent long-range fluid coupling in the cochlea, as claimed, and it is shown that the long- range component of Nobili et al.
Laser amplification with a twist: traveling-wave propagation and gain functions from throughout the cochlea.
- PhysicsThe Journal of the Acoustical Society of America
- 2007
The results establish the existence of traveling-wave amplification throughout the cochlea, including the apex, and derived propagation and gain functions resemble those characteristic of an active optical medium but rotated by 90 degrees in the complex plane.
Basilar-membrane interference patterns from multiple internal reflection of cochlear traveling waves.
- PhysicsThe Journal of the Acoustical Society of America
- 2013
Analysis of the responses of active cochlear models suggests that the rippling is a mechanical interference pattern created by multiple internal reflection within the cochlea, and data indicate that SFOAE delays are consistent with reverse slow-wave propagation but much too long to be explained by fast waves.
The Elusive Cochlear Filter: Wave Origin of Cochlear Cross-Frequency Masking
- PhysicsJournal of the Association for Research in Otolaryngology
- 2021
A simple framework consisting of a nonlinear traveling-wave model whose spatial response properties can be estimated from basilar-membrane (BM) transfer functions is described, providing perhaps the simplest representation of cochlear signal processing that accounts for the spatially distributed effects of nonlinear wave propagation.
References
SHOWING 1-10 OF 70 REFERENCES
Wave Reflection in Passive and Active Cochlea Models
- Physics, Geology
- 1983
In the formulation of a cochlea model, ‘waves-to-the-right’ (i.e. from stapes to helicotrema) are generally treated as equivalent to ‘waves-to-the-left’. In the resonance peak region of the model the…
Short-wave world revisited: Resonance in a two-dimensional cochlear model
- PhysicsHearing Research
- 1979
The short-wave model and waves in two directions.
- Physics
- 2001
In the region where a sinusoidal wave in the cochlea reaches its maximum amplitude, the long-wave (or one-dimensional) model of the cochlea is deficient. In this region a short-wave model is more…
Noninvasive measurement of the cochlear traveling-wave ratio.
- PhysicsThe Journal of the Acoustical Society of America
- 1993
Measurements of stimulus-frequency emissions are described, their analyticity properties are established, and they are used to explore the spatial distribution of mechanical inhomogeneities (emission "generators") in the human cochlea to suggest that the distribution of inhomogenities is uncorrelated with the periodicity found in the threshold microstructure.
Ranke revisited--a simple short-wave cochlear model.
- PhysicsThe 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.
Do Forward- and Backward-Traveling Waves Occur Within the Cochlea? Countering the Critique of Nobili et al.
- PhysicsJournal of the Association for Research in Otolaryngology
- 2004
It is demonstrated that the one-dimensional wave-equation formulation of cochlear hydrodynamics does not misrepresent long-range fluid coupling in the cochlea, as claimed, and it is shown that the long- range component of Nobili et al.
WAVE INTERFERENCE IN THE GENERATION OF REFLECTION- AND DISTORTION-SOURCE EMISSIONS
- Physics
- 2003
Although mammalian otoacoustic emissions (OAEs) have generally been regarded as originating through nonlinear electromechanical distortion, measurements of OAE phase made using frequency-scaled…
The origin of periodicity in the spectrum of evoked otoacoustic emissions.
- PhysicsThe Journal of the Acoustical Society of America
- 1995
Ear-canal measurements are related to cochlear mechanics by assuming that the transfer characteristics of the middle ear vary slowly with frequency compared to oscillations in the emission spectrum, and Measurements of basilar-membrane motion in the squirrel monkey are used to predict the spectral characteristics of their emissions.

















