Journal of Theoretical
and Applied Mechanics
56, 4, pp. 961-976, Warsaw 2018
DOI: 10.15632/jtam-pl.56.4.961

Effects of viscoelastic and porous materials on sound transmission of multilayer systems

Hadda Felhi, Hassen Trabelsi, Mohamed Taktak, Mabrouk Chaabane, Mohamed Haddar
Multilayer structures allow obtaining good performance in acoustic insulation to eliminate
unwanted noise in the medium and high frequencies in many applications such as building
and transport industry. In this paper, the sound transmission of multilayer systems is stu-
died using the Transfer Matrix Method (TMM). The studied multi-layered panels include
elastic, viscoelastic and porous materials. Several configurations of multilayer systems are
studied, and their corresponding transmission loss TL is computed. Also, the effects of po-
rous material characteristics are studied to evaluate the impact of each parameter.
Keywords: porous material, multilayer system, transmission loss, transfer matrix

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