ANOMALIES OF THE PROPAGATION OF LONGITUDINAL SOUND IN 
A LAYER OF A DISSIPATIVE MEDIUM

D. A. Kostyuka and Yu. A. Kuzavkob

UDC 534.838.4

Normal propagation of continuous and pulse longitudinal 
acoustic waves through the gap between two solid half-spaces, which 
is filled with a dissipative medium, has been considered theoretically. 
A strong dependence of the transmission and reflection coefficients 
and of their phases on the coefficient of damping of longitudinal 
sound in the medium of the gap and on its dimensionless phase thickness 
has been shown. The shapes of the reflected acoustic pulsed signal 
and of the signal transmitted by the gap have been calculated using 
software. The results obtained are used in investigation of the acoustic 
properties of viscous fluids. Application of the transformed spectrum 
of the signals to development of radiation devices and processing 
of information is discussed.

aBrest State Technical University, Brest, Belarus; email: 
d.k@softhome.net; bInstitute of Radio Engineering and Electronics, 
Russian Academy of Sciences, Moscow, Russia; email: kuzavko@newmail.ru. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 1, 
pp. 128-133, January-February, 2003. Original article submitted April 
4, 2002; revision submitted July 25, 2002.