TABLE II.

Acoustic Property Values of Different Tissue Types

Medium	SOS [m/s]	AA [N p/m H zy]	Density [k g/m3]
Water	1500 @ 26°C [47]	0.025328436023 [48]	994 [48]
Skin	$\mathcal{T}\mathcal{N}$ (1555.0, 10.0, 1530, 1580) [10]	$\mathcal{N}$ (21.158, 2.16) [48]	$\mathcal{T}\mathcal{N}$ (1109, 14, 1100, 1125) [48]
Fat	$\mathcal{T}\mathcal{N}$ (1440.2, 20.9, 1412, 1485) [10], [49]	$\mathcal{N}$ (4.3578, 0.436) [48]	$\mathcal{T}\mathcal{N}$ (911, 53, 812, 961) [48]
Glandular	$\mathcal{T}\mathcal{N}$ (1540.0, 15.0, 1517, 1567) [10], [49]	$\mathcal{N}$ (8.635, 0.86) [48]	$\mathcal{T}\mathcal{N}$ (1041, 45.3, 990, 1092) [48]
Ligament	$\mathcal{T}\mathcal{N}$ (1457, 18.5, 1422, 1565) [10], [49]	$\mathcal{N}$ (14.506, 1.45) [48]	$\mathcal{T}\mathcal{N}$ (1142, 45, 1110, 1174) [48]
Tumor	$\mathcal{T}\mathcal{N}$ (1548, 10.3, 1531, 1565) [4]	$\mathcal{N}$ (31, 2.3)	$\mathcal{T}\mathcal{N}$ (945, 20, 911, 999) [51]