Advanced dispersion measurement techniques for the characterization of the mechanical properties of poro-visco-elastic materials

Dispersion measurement techniques are normally used to determine the mechanical properties of poro-visco-elastic materials, such as their shear modulus. However, dispersion measurements of poro-visco-elastic materials are not easy and the experimentally accessible frequency range in which the modes of propagation are detectable is limited to the lower frequency range, typically up to about 1500 Hz. In this article an advanced measurement technique is discussed to perform the dispersion measurement, allowing to capture reliable measurement data up to higher frequencies and for higher order modes of propagation. A typical measurement result using the proposed approach is shown and the results…