Wave propagation patterns in a "classical" three-dimensional model of the cochlea.

@article{deBoer2007WavePP,
  title={Wave propagation patterns in a "classical" three-dimensional model of the cochlea.},
  author={Egbert de Boer and Alfred L. Nuttall and Christopher A. Shera},
  journal={The Journal of the Acoustical Society of America},
  year={2007},
  volume={121 1},
  pages={
          352-62
        }
}
The generation mechanisms of cochlear waves, in particular those that give rise to otoacoustic emissions (OAEs), are often complex. This makes it difficult to analyze wave propagation. In this paper two unusual excitation methods are applied to a three-dimensional stylized classical nonlinear model of the cochlea. The model used is constructed on the basis of data from an experimental animal selected to yield a smooth basilar-membrane impedance function. Waves going in two directions can be… 
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It is shown that in a feed-forward model a DP wave generated by a two-tone stimulus is almost exclusively a forward-traveling wave which property agrees with the nature of the experimental findings.
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The acoustic pathway for transmission of energy from the inside of the cochlea to the outside through a physiologically-based theoretical model is studied and it is predicted that the emission is dominated by a backward traveling fluid-structure wave.
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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.
Imaging forward and Reverse Traveling Waves in the Cochlea
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The analysis of the spatial frequency response of the inner hair cell stereocilia at frequencies near the characteristic frequency of the measurement location suggests that a traveling wave propagates in the cochlear partition simultaneously basal and apical from the probe location.
Forward and reverse waves in nonclassical models of the cochlea.
In “classical” models of the cochlea the mechanical properties of the cochlear partition (in which the basilar membrane plays a dominant role) depend only on the local longitudinal coordinate. Wave…
Reverse wave propagation in the cochlea
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It is shown that BM vibration amplitude and phase at the cubic distortion product (DP) frequency are very similar to responses evoked by external tones, consistent with the idea that the emission comes out of the cochlea predominantly through compressional waves in the co chlear fluids.
Forward and Reverse Waves: Modeling Distortion Products in the Intracochlear Fluid Pressure.
Simultaneous Intracochlear Pressure Measurements from Two Cochlear Locations: Propagation of Distortion Products in Gerbil
  • W. Dong
  • Physics
    Journal of the Association for Research in Otolaryngology
  • 2016
TLDR
A custom-made micro-pressure sensor was used in vivo in the gerbil cochlea to map two-tone-evoked pressure responses at distinct longitudinal and vertical locations in both the scala tympani and scala vestibuli, demonstrating that distortion products may travel in both forward and reverse directions post-generation and the existence of both traveling and compression waves.
Fast reverse propagation of sound in the living cochlea.
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References

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