Abstract
Dynamic behavior of the inner ear is very remarkable. However, due to the complexity of in vivo experimentations, still some aspects of physiological functions need to be investigated. This paper focuses on the comparison between an experimental setup reproducing the passive behaviour of the inner ear and the corresponding modelling. As in the inner ear, external sound stimulations create travelling wave within the waveguide constituted of two filled ducts partitioned by a plate of varying width. The fluid structure interactions reach a maximum peak of vibration at a particular place depending on the input frequency. The modelling of this inhomogeneous waveguide uses the Wentzel-Kramers-Brillouin method. The wavenumber is calculated by solving the eiconal equation. The transport energy equation provides the amplitude of the wave for each position along the waveguide. Classical artificial cochlea devices reveal non physical standing waves. Here a new technique is used to reduce the wave reflection at the end of the waveguide. An acoustic black hole is designed in order to make the celerity of the wave tend to zero. Due to this phenomenon, the observation of real travelling wave on an experimental device becomes possible. This paper focuses on the design of the device. Corresponding theoretical results are presented in the last section.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Selva P, Morlier J, Gourinat Y (2009) Development of a dynamic virtual reality model of the inner ear sensory system as a learning and demonstrating tool. Model Simulat Eng 2009:1–10
Steele C, Taber L (1979) Comparison of WKB calculations and experimental results for three-dimensional cochlear models. J Acoust Soc Am 65:1007
Neely ST, Kim DO (1986) A model for active elements in cochlear biomechanics. J Acoust Soc Am 79:1472–1480
Shintaku H, Nakagawa T, Kitagawa D, Tanujaya H, Kawano S, Ito J (2010) Development of piezoelectric acoustic sensor with frequency selectivity for artificial cochlea. Sens Actuator A: Phys 158:183–192
White R (2005) Biomimetic trapped fluid microsystems for acoustic sensing. University of California, San Diego
White R, Grosh K (2005) Microengineered hydromechanical cochlear model. Proc Nat Acad Sci U S A 102:1296
Zhou G, Bintz L, Anderson DZ, Bright KE (1993) A life-sized physical model of the human cochlea with optical holographic readout. J Acoust Soc Am 93:1516–1523
Krylov V, Tilman F (2004) Acoustic ‘black holes’ for flexural waves as effective vibration dampers. J Sound Vib 274:605–619
Georgiev V, Cuenca J, Gautier F, Simon L, Krylov V (2011) Damping of structural vibrations in beams and elliptical plates using the acoustic black hole effect. J Sound Vib 330:2497–2508
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 The Society for Experimental Mechanics, Inc.
About this paper
Cite this paper
Foucaud, S., Michon, G., Gourinat, Y., Pelat, A., Gautier, F. (2012). Designing an Experiment Inspired by Cochlea for Travelling Waves Observation. In: Allemang, R., De Clerck, J., Niezrecki, C., Blough, J. (eds) Topics in Modal Analysis II, Volume 6. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2419-2_21
Download citation
DOI: https://doi.org/10.1007/978-1-4614-2419-2_21
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4614-2418-5
Online ISBN: 978-1-4614-2419-2
eBook Packages: EngineeringEngineering (R0)