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Artificial cochlea and acoustic black hole travelling waves observation: Model and experimental results

Foucaud, Simon and Michon, Guilhem and Gourinat, Yves and Pelat, Adrien and Gautier, François Artificial cochlea and acoustic black hole travelling waves observation: Model and experimental results. (2014) Journal of Sound and Vibration, 333 (15). 3428-3439. ISSN 0022-460X

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.jsv.2014.03.016


An inhomogeneous fluid structure waveguide reproducing passive behaviour of the inner ear is modelled with the help of the Wentzel–Kramers–Brillouin method. A physical setup is designed and built. Experimental results are compared with a good correlation to theoretical ones. The experimental setup is a varying width plate immersed in fluid and terminated with an acoustic black hole. The varying width plate provides a spatial repartition of the vibration depending on the excitation frequency. The acoustic black hole is made by decreasing the plate׳s thickness with a quadratic profile and by covering this region with a thin film of viscoelastic material. Such a termination attenuates the flexural wave reflection at the end of the waveguide, turning standing waves into travelling waves.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Sound and Vibration website: http://www.sciencedirect.com/science/journal/0022460X/
HAL Id:hal-01111368
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Université du Maine (FRANCE)
Laboratory name:
Deposited On:30 Jan 2015 10:55

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