Assessment of the Performance of Trim Materials : Modeling and Validation by Mean of Several Measurement Strategies

International audience; Trim materials are designed to minimize sound transmission and maximize sound absorption. Often, a balance between those two quantities is desired with an emphasis on one or another depending on the application in hand. Porous material are typically used as they allow for both sound absorption and transmission loss while minimizing the added mass. In this paper, the performance of a melamine foam panel is assessed. The considered sample is glued on the A2-size opening of a heavy concrete cabin designed for material testing in absorption (Alpha-cabin-like) and transmission (from the cabin to surrounding environment). The material is excited through a random sound fiel…