Title :
Transmission of ultrasonic waves through porous layers of high flow resistivity saturated by air
Author :
Kelders, Luc ; Lauriks, Walter ; Allard, Jean François
Author_Institution :
Lab. voor Akoestiek en Thermische Fysica, Katholieke Univ., Leuven, Heverlee, Belgium
Abstract :
Transmission of ultrasonic waves through porous materials of high flow resistivity and porosity (in contact with air at both faces) is modelled and measured for an open-bubble foam at normal and oblique incidence. The importance of the airborne wave and the differences with the case of an elastic nonporous solid are demonstrated. A simple method to measure the shear modulus and the Poisson coefficient of the frame is suggested for similar materials.
Keywords :
Poisson ratio; foams; porous materials; shear modulus; ultrasonic transmission; Poisson coefficient; airborne wave; flow resistivity; oblique incidence; open-bubble foam; porosity; porous layers; shear modulus; ultrasonic wave transmission; Acoustic materials; Biological materials; Conductivity; Context modeling; Fluid flow measurement; Frequency; Solids; Tiles; Ultrasonic variables measurement; Viscosity;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
