DESIGN GUIDELINES FOR THE ACOUSTIC PERFORMANCE IMPROVEMENT OF A PERIODIC POROUS MATERIAL

D Magliacano , M. Ouisse (1) , S de Rosa , F. Franco (2) , A. Khelif (1)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 Department of Computer Architecture and Automation [Madrid]

In this paper, some guidelines are provided in order to predict at which frequency the 1 st performance peak (related to periodicity effects: half of the wavelength = periodicity dimension) appears, together with its amplitude, as functions of the unit cell dimensions. Conversely, also the link between the unit cell dimensions and the 1 st performance peak amplitude as functions of the design frequency is shown. Furthermore, some additional guidelines are provided in order to predict at which frequency the 1 st performance peak appears, together with its amplitude, as functions of the foam airflow resistivity.

Domaines: Acoustique [physics.class-ph]

D Magliacano, M. Ouisse, S de Rosa, F. Franco, A. Khelif. DESIGN GUIDELINES FOR THE ACOUSTIC PERFORMANCE IMPROVEMENT OF A PERIODIC POROUS MATERIAL. 3rd Euro-Mediterranean Conference on Structural Dynamics and Vibroacoustics, Feb 2020, Napoli, Italy. ⟨hal-02485094⟩