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Using shock waves to improve the sound absorbing efficiency of closed-cell foams

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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 : 5.

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Abstract

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.

Item Type: Peer reviewed article published in a journal
Professor:
Professor
Doutres, Olivier
Affiliation: Autres
Date Deposited: 28 Oct 2014 15:21
Last Modified: 22 Nov 2017 21:31
URI: http://espace2.etsmtl.ca/id/eprint/8779

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