Doutres, Olivier, Atalla, Noureddine, Brouillette, Martin et Hebert, Christian.
2014.
« Using shock waves to improve the sound absorbing efficiency of closed-cell foams ».
Applied Acoustics, vol. 79.
pp. 110-116.
Compte des citations dans Scopus : 16.
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Résumé
Producing closed-cell foams is generally cheaper and simpler than open-cell foams. However, the acoustic and filtration efficiency of closed-cell foam materials is generally poor because it is very difficult for fluid or acoustic waves to penetrate into the material. A new method using shock waves to remove the membranes closing the cell pores (known as reticulation) and thus to improve the acoustic and filtration behavior of closed-cell foam material is presented. Various shock treatments have been carried out on polyurethane and polyimide foams and the following conclusions were drawn: (1) reticulation efficiency increased and thus the airflow resistivity and tortuosity decreased when increasing the amplitude of the shock treatment; (2) the rigidity of the foam is decreased; (3) the process is reliable and repeatable and (4) obtained acoustic performance is comparable to classical thermal reticulation.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Doutres, Olivier |
| Affiliation: | Autres |
| Date de dépôt: | 28 oct. 2014 15:21 |
| Dernière modification: | 22 nov. 2017 21:31 |
| URI: | https://espace2.etsmtl.ca/id/eprint/8779 |
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