Wave Processes in Anisotropic Elastic Structures. Sound Scattering by Randomly Oriented Spheroidal Bodies

It is well known [99] that a pulsed sound signal, like a bunch of energy, propagates at a group velocity.
This circumstance forces us to use the method of imaginary sources when studying the
temporal characteristics of pulsed signals scattered by various bodies placed in a plane waveguide
[83–86,89,90]. Wherein the spectral characteristics of the pulses dea-ling with continuous harmonic
signals can also studied using the normal wave method [82].
When studying waves in anisotropic media, the initial equations are the dynamic equilibrium of
continuous medium [37,88,129–131]