Application of Fractional Calculus to the Sound Waves Propagation in Rigid Porous Materials: Validation Via Ultrasonic Measurements
Résumé
This paper starts by summarizing the basic equations of a theoretical model, recentely published by Fellah and Depollier [1], which describes the propagation of pulses in the time domain through a porous medium. In the field of absorbing acoustical porous media, the predictive equations have always been written in the frequency domain. The new method that is proposed is based on the concept of fractional derivatives. The added value of the present work consists in a fine experimental validation performed in plastic foams, sandy sediments and on multilayered porous materials.
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)