A simulation of the vibroacoustic processes proceeding in a long pipe with an obstacle in the form of a circular cylinder, in which a fluid flows, has been performed with regard for the action of the vortices formed downstream of the cylinder on the dynamics of the system. On the basis of the computational procedure developed, the vibroacoustic characteristics of the system have been determined. The distributions of the gasdynamic parameters of the fluid flow in the pipe and the vibroacoustic behavior of the system are discussed.