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TECHNICAL PAPERS

Modes and Balance of Energy in the Piezoelectric Cochlear Outer Hair Cell Wall

[+] Author and Article Information
Alexander A. Spector, Ronald P. Jean

Department of Biomedical Engineering, Johns Hopkins University, 720 Rutland Ave., Baltimore, MD 21205

J Biomech Eng 126(1), 17-25 (Mar 09, 2004) (9 pages) doi:10.1115/1.1644564 History: Received December 10, 2002; Revised October 10, 2003; Online March 09, 2004
Copyright © 2004 by ASME
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References

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Figures

Grahic Jump Location
a) Cross-section of the cochlea showing inner (IHC) and outer hair cells (OHC) sitting between the tectorial and basilar membranes; b) sketch of an outer hair cell under the action of an electric field and axial force; and c) a model of the outer hair cell as a cylinder with a liquid (incompressible) core bounded by a lateral wall (Sl and Sl+ are, respectively, the internal and external surfaces of the lateral wall) and two flat caps Sa and Sb
Grahic Jump Location
The longitudinal (a) and circumferential (b) components of the passive strain as functions of voltage for different values of the external force (closed triangles F=0.3 mN/m, open circles F=−0.3 mN/m, and solid line F=0)
Grahic Jump Location
The first form of the active energy (entering balance of the mechanical energy) as a function of voltage for different values of the external force (closed triangles F=0.3 mN/m, open circles F=−0.3 mN/m, and solid line F=0); a) C22=0.2 N/m, and b) C22=0.3 N/m
Grahic Jump Location
The stored mechanical energy as a function of voltage for different values of the external force (closed triangles F=0.3 mN/m, open circles F=−0.3 mN/m, and solid line F=0); a) C22=0.2 N/m, and b) C22=0.3 N/m
Grahic Jump Location
The second form of the active energy (entering balance of the electrical energy) as a function of voltage for different values of the external force (closed triangles F=0.3 mN/m, open circles F=−0.3 mN/m, and solid line F=0); a) C22=0.2 N/m, and b) C22=0.3 N/m
Grahic Jump Location
The external electrical work as a function of voltage for different values of the external force (closed triangles F=0.3 mN/m, open circles F=−0.3 mN/m, and solid line F=0)
Grahic Jump Location
The effectiveness of the electromotile outer hair cell as a function of voltage under the conditions of purely electrical loading for two values of C22

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