Acoustic absorption of non-homogeneous poro-elastic materials
Keywords:Finite element method, Mathematical models, Mineral wool, Porous materials, Tensile stress, Waveguides, Biot theory
AbstractA model to evaluate the acoustic absorption performance of configurations consisting of a porous material, bonded onto the hard termination of a semi-infinite rectangular waveguide is presented. A power balance approach is used to evaluate the performance of the porus material using the absorption coefficient. An experimental validation is performed for a macro-perforated material, which consists in a mineral wool with periodic holes containing air. The absorption coefficient of non-homogeneous porous-elastic layers is predicted.
How to Cite
Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i) to publish, reproduce, distribute, display and store the Contribution;
ii) to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii) to exploit all subsidiary rights in the Contribution,
iv) to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v) to licence any third party to do any or all of the above.