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

作者：Foucaud Simon^*; Michon Guilhem; Gourinat Yves; Pelat Adrien; Gautier Francois

来源：Journal of Sound and Vibration, 2014, 333(15): 3428-3439.

DOI：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.

• 出版日期2014-7-21