• Questions

Ultrasonic characterisation of porous materials, by Philippe Leclaire (University of Burgundy)

Dec. 4, 2017
Duration: 01:37:45
Number of views 116
Number of favorites 0

DENORMS Action's Training School "Experimental techniques for acoustic porous materials and metamaterials", Le Mans, 4-6th December 2017

Website of DENORMS Action

Programme of the Training School

Lecturer: Philippe Leclaire (University of Burgundy)


Acoustic models of the acoustics of porous and perforated media involve a set of physical parameters. Some of the parameters, the tortusity, the viscous and thermal characteristic lengths are defined for a perfect incompressible and inviscid fluid saturating the porous medium. It is shown that ultrasonic propagation in air-saturated materials can be used to determine these parameters. A basic method involving air-coupled ultrasonic transducers is presented. Variants of this method and a practical implementation of one of these is proposed.