Attenuation and speed of ultrasound in lung: dependence upon frequency and inflation.
The dependence of the speed of sound and the attenuation coefficient upon exposure frequency, in the range of 1-5 MHz, and upon level of inflation, in the range of mass density 0.35-0.7 g/cm3, are reported. The speed of sound decreases linearly and the attenuation coefficient increases exponentially, for all levels of inflation studied.
D000818:Animals; D008168:Lung; D013997:Time Factors; D014465:Ultrasonics