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attenuationWater

Calculate ultrasound attenuation in distilled water

Syntax

att = attenuationWater(f, T)

Description

attenuationWater calculates the ultrasonic absorption in distilled water at a given temperature and frequency using a 7th order polynomial fitted to the data given by Pinkerton (1949, The Absorption of Ultrasonic Waves in Liquids and its Relation to Molecular Constitution, Proceedings of the Physical Society. Section B, 2, 129-141). A plot of the absorption at 20degC returned by attenuationWater along with the absorption calculated by the corresponding power law given by Szabo (2004, Diagnostic Ultrasound Imaging) is given below.

f = 0:2:50;                     % [MHz]
att = attenuationWater(f, 20);  % [dB/cm]
figure;
plot(f, att, 'k-', f, 2.17e-3*f.^2, 'bx');
xlabel('frequency [MHz]');
ylabel('attenuation coefficient [dB/cm]');

Inputs

f

array of frequency values [MHz]

T

water temperature [degC]

Outputs

att

attenuation [dB/cm]

See Also

speedSoundWater


© 2009-2014 Bradley Treeby and Ben Cox.