A readily applicable procedure is presented for calculating the contribution of one-phonon scattering (TDS) to measured integrated intensities for single crystals of any symmetry under conventional experimental situations. The anisotropy of the scattering is included correctly within the continuum elasticity approximation. A computer program is presented for the calculation of TDS contribution for cubic, tetragonal, orthorhombic, hexagonal and trigonal crystal structures. The procedure is applied to the calculation of the one-phonon contribution for the hexagonal and tetragonal crystal structures.