Calculation of the transmission of sound by linear transport facilities in the environment

Calculation schemes are proposed for major artificial transportation facilities, presenting a linear source of sound propagation in open space and semi sphere half with the location of the noise source on the plane, overpass, in the cutting and over the embankment of the presence and at the absence of acoustic barriers. Formulas for calculating sound propagation of are proposed. Calculation showing comparative values of sound pressure levels during propagation of sound through various structures is executed.