Foam-X: standalone utility for quick characterization of the acoustic properties of open cell porous materials from impedance tube measurements. Defining the acoustic properties of porous noise control treatments is a critical part of the acoustical design process in a simulation software. FOAM-X calculates the required acoustic material properties from standard tests.
FOAM-X uses identification algorithms that works with acoustic data output from ASTM E1050 and ISO 10534-2 impedance tube tests or ASTM E2611 transmission tube tests to identify porous material properties. From sound absorption coefficient or dynamic bulk modulus and dynamic bulk density, it calculates the main acoustic properties of open-cell porous materials: open porosity, static airflow resistivity, tortuosity, viscous and thermal characteristic lengths, thermal static permeability, Young's modulus, Poisson's ratio and damping loss factor.