Fractal Model for Acoustic Absorbing of Porous Fibrous Metal Materials

Table 6

The physical parameters of the porous metallic samples and calculated static flow resistivities.

Sample; number	Porosity; (%)	Fiber radius; (µm)	Thickness; (mm)	Tortuosity	Static flow resistivity; σ (Nm^−4s)
#1	76.38	50	25	1.12	40323
#2	79.08	50	25	1.11	28057
#3	81.34	50	25	1.10	20523
#4	83.25	50	25	1.08	15594
#5	84.89	50	25	1.08	12209
#6	87.51	50	25	1.06	8009
#7	90.33	50	25	1.04	4797