Modeling and estimation of acoustic pulse energy dissipation in a waveguide with elastic walls

In this paper we study the wave processes in the boundary acoustic layers of the multimode waveguide systems. Wave propagation in a waveguide with “imperfectly” rigid walls is considered. Thermoviscous effects that occur when a wave propagates in a near-surface layer with a finite impedance of the inner surface of the waveguide are considered. The estimation of changes in the energy dissipation of a propagating wave of rigid walls is performed.