Solution of mixed problems on diffraction of non stationary plane and cylinder waves on a half-plane and explosion waves protection by barriers

Exact analytical solutions of diffraction problems are obtained for nonstationary plane and cylindrical waves on a half-plane when the following mixed boundary conditions are given: the Neumann condition on one side of the half-plane and the Dirichlet condition on the other one. The numerical analysis of near-front asymptotic solutions shows that there is a considerably greater weakening (attenuation) of explosive waves behind the half-plane (barrier) with sides of the different noise absorption properties, than under full reflection from both sides of the half-plane.