. 2013 May 28;1(2):9–18. doi: 10.1016/j.pacs.2013.05.001

Table 1.

Measured acoustic properties of lens materials (Stycast 1090SI and PMMA) compared with literature values for water. All values are for material at 21 ⁰C and for frequency of 1 MHz. The longitudinal velocity, shear velocity and acoustic attenuation are used in 3D FEM simulations.

Acoustic properties	PMMA	Stycast 1090SI	Water	FML^a
Longitudinal velocity (m s⁻¹)	2757	2561	1486^b	2068
Shear velocity (m s⁻¹)	1400^c	900	-	994
AA (dB cm⁻¹)	1.64	1.69	-	-
Density (g cm⁻³)	1.20	0.56	1.00	3.14
Impedance (MRayl)	3.32	1.43	1.49^b	6.49

FML: Detector front matching layer, values from Ref. [26].

Ref. [29].

Ref. [30].