  There is a considerable number of research publications on the acoustical
properties of porous media with an elastic frame. A simple search through the
Web of ScienceTM (last accessed 21 March 2018) suggests that there are at least
819 publications which deal with the acoustics of poroelastic media. A majority
of these researches require accurate knowledge of the elastic properties over a
broad frequency range. However, the accuracy of the measurement of the dynamic
elastic properties of poroelastic media has been a contentious issue. The
novelty of this paper is that it studies the reproducibility of some popular
experimental methods which are used routinely to measure the key elastic
properties such as the dynamic Young's modulus, loss factor and Poisson ratio
of poroelastic media. In this paper, fourteen independent sets of laboratory
measurements were performed on specimens of the same porous materials. The
results from these measurements suggest that the reproducibility of this type
of experimental method is poor. This work can be helpful to suggest
improvements which can be developed to harmonize the way the elastic properties
of poroelastic media are measured worldwide.
