Experimental and Numerical Investigation of Acoustic Performance for Full-Sized SPS

Table 6

Properties of core materials.

Core material	Density (Kg∙m^−3)	Elasticity modulus (GPa)	Poisson ratio
Polyurethane	1200	1	0.44
Aluminum alloy	2698	63.82	0.35
Composite material	1900	18	0.15