| Numéro |
J. Phys. IV France
Volume 04, Numéro C5, Mai 1994
3ème Congrés français d'acoustique3rd French conference on acoustics |
|
|---|---|---|
| Page(s) | C5-177 - C5-182 | |
| DOI | https://doi.org/10.1051/jp4:1994533 | |
3ème Congrés français d'acoustique
3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-177-C5-182
DOI: 10.1051/jp4:1994533
Laboratoire d'Acoustique de l'Université du Maine, URA 1101 du CNRS, Université du Maine, Avenue Olivier Messiaen, BP. 535, 72017 Le Mans cedex, France
© EDP Sciences 1994
3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-177-C5-182
DOI: 10.1051/jp4:1994533
Modèles récents pour la propagation du son dans les matériaux poreux
J.-F. ALLARDLaboratoire d'Acoustique de l'Université du Maine, URA 1101 du CNRS, Université du Maine, Avenue Olivier Messiaen, BP. 535, 72017 Le Mans cedex, France
Abstract
The modelling of the interactions between porous structures and saturating fluids has known new developments. D.L. Johnson has given a rigorous definition of tortuosity and has introduced a new parameter, the viscous characteristic dimension. A thermal characterictic dimension can be defined in a similar way. For the case of elastic structures, the two compressional waves must be taken into account. A matrix formulation is presented, which simplifies the modelling of stratified porous materials having an elastic structure.
© EDP Sciences 1994