ArticleThe Journal of the Acoustical Society of America2023
Crucial 3-D viscous hydrodynamic contributions to the theoretical modeling of the cochlear response.
Article in The Journal of the Acoustical Society of America, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 10 citations in OpenAlex.
- Displacement gradients in the lateral region of the organ of Corti dissipate power in the cochlea.Biophysical journal · 2026Article
- Infrasound sensation is mediated by intracochlear electrical potentials.Scientific reports · 2026Article
- The role of scalae geometry in cochlear mechanical responses: Pressure focusing in two and three dimensions.The Journal of the Acoustical Society of America · 2026Article
- Coupled oscillator mechanism extends the amplifying effect of outer hair cells to high frequencies.Scientific reports · 2025Article
- The Reduced Cortilymph Flow Path in the Short-Wave Region Allows Outer Hair Cells to Produce Focused Traveling-Wave Amplification.Journal of the Association for Research in Otolaryngology : JARO · 2025Article
- Foundations of the Wentzel-Kramers-Brillouin approximation for models of cochlear mechanics in 1- and 2-D.The Journal of the Acoustical Society of America · 2024Article
- Intracochlear overdrive: Characterizing nonlinear wave amplification in the mouse apex.The Journal of the Acoustical Society of America · 2023Article
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Authors and funding
5 authors at 3 institutions in 2 countries.
Funding
Abstract
This study uses a 3-D representation of the cochlear fluid to extend the results of a recent paper [Sisto, Belardinelli, and Moleti (2021b). J. Acoust. Soc. Am. 150, 4283-4296] in which two hydrodynamic effects, pressure focusing and viscous damping of the BM motion, both associated with the sharp increase in the wavenumber in the peak region, were analyzed for a 2-D fluid, coupled to a standard 1-D transmission-line WKB approach to cochlear modeling. The propagation equation is obtained from a 3-D fluid volume conservation equation, yielding the focusing effect, and the effect of viscosity is represented as a correction to the local 1-D admittance. In particular, pressure focusing amplifies the BM response without modifying the peak admittance, and viscous damping determines the position of the response peak counteracting focusing, as sharp gradients of the velocity field develop. The full 3-D WKB formalism is necessary to represent satisfactorily the behavior of the fluid velocity field near the BM-fluid interface, strictly related to viscous losses. As in finite element models, a thin layer of fluid is effectively attached to the BM due to viscosity, and the viscous force associated with the vertical gradient of the fluid vertical velocity acts on the BM through this layer.
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