. Author manuscript; available in PMC: 2013 Sep 11.

Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2010 Oct;57(10):2284–2292. doi: 10.1109/TUFFC.2010.1689

Table 3.

Ultrasonic propagation speeds and attenuation coefficients at 22°C for materials in phantom 1.

	BACKGROUND			SPHERES
FREQUENCY (MHz)	SPEED (m/s)	ATTEN COEFF (dB/cm)	ATTEN COEFF ÷ FREQUENCY (dB/cm/MHz)	SPEED (m/s)	ATTEN COEFF (dB/cm)	ATTEN COEFF ÷ FREQUENCY (dB/cm/MHz)
20	1538.4	9.48	0.47	1538.3	9.17	0.46
30	1539.8	16.72	0.56	1539.3	15.93	0.53
40	1540.6	27.84	0.70	1539.8	25.25	0.63
50	1541.2	38.65	0.77	1540.3	34.60	0.69