Table 1.

Part of material constants of gold, platinum, titanium, and silicon dioxide [39].

Material Constant	Au	Pt	Ti	SiO2
Young’s Modulus (GPa)	78	170	110	74
Poisson ratio	0.42	0.38	0.32	0.17
Density (×103 kg/m3)	19.32	21.14	4.48	2.20
Shear velocity (m/s)	1200	1730	3100	2850
Acoustic impedance (×106 kg/m2s)	51.20	63.42	27.33	12.67