[Reports] / Amer.inst.of aeronautics and astronautics. N 87-2668 : Expeirments on the applicability of MAE techniques for predicting sound diffraction by irregular terrains : Papers presentet at AIAA 11th aeroacoustics conf., Okt.19-21, 1987 / Y.M.Brthelot,A.D.Pierce,J.A.Kearns, 1987. - 6 p. - Текст : непосредственный.