0000000000351902
AUTHOR
Jean-philippe Groby
Slatcow (Spatial Laplace Transform for Complex Wavenumber Recovery) Method for Frequency / Complex Wavenumber Dispersion Relation Recovery
International audience
Acoustic characterization of Silica aerogel clamped plates for perfect absorption purpose
International audience; Silica aerogel has been widely studied as bulk material for its extremely low density and thermal conductivity. Plates or membranes made of this extremely soft materials exhibits interesting properties for sound absorption. A novel signal processing method for the characterization of an acoustic metamaterial made of silica aerogel clamped plates is presented. The acoustic impedance of a silica aerogel clamped plate is derived from the elastic theory for the flexural waves, while the transfer matrix method is used to model reflection and transmission coefficients of a single plate. Experimental results are obtained by using an acoustic impedance tube. The difference b…
Caractérisation de nombres d'ondes complexes par transformée de Laplace : application aux ondes guidées dans les matériaux poreux
International audience
Propagation d'ondes acoustiques dans un milieu périodique avec résonateurs
International audience
Etude Expérimentale des Modes de Lamb à Vitesse de Groupe Nulle (ZGV) dans le Plan Complexe des Nombres d'Ondes
International audience