ANOMALIES OF THE BOUNDARY REFLECTION OF ULTRASOUND 
FROM THE FILM OF A DISSIPATIVE MEDIUM

D. A. Kostyuka and Yu. A. Kuzavkob

UDC 621.9.08

Theoretical consideration has been given to the reflection 
of continuous and pulsed longitudinal and transverse acoustic waves 
from the film of a dissipative medium which is in contact with a solid-state 
half-space. It has been shown that the reflection coefficient and 
its phase substantially depend on the coefficient of attenuation of 
ultrasound in the dissipative-medium film and on its phase thickness. 
The shape of the reflected acoustic pulsed signal has been calculated 
using software. The application of the results obtained to investigation 
of the acoustic properties of viscous fluids is discussed.

aBrest State Technical University, 
Brest, Belarus; bInstitute of Radio Engineering 
and Electronics, Russian Academy of Sciences, Moscow, Russia; email: 
kuzavko@newmail.ru. Translated from Inzhenerno-Fizicheskii Zhurnal, 
Vol. 75, No. 4, pp. 181-186, July-August, 2002. Original article 
submitted March 3, 2001; revision submitted February 11, 2002.

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