[Reports] / Amer.inst.of aeronautics and astronautics. N 87-2704 : Models for evaluating the performance of propeller aircraft active noise control systems : Papers presented at AIAA 11th aeroacoustics conf., Oct.19-21, 1987, Palo Alto(Ca) / A.J.Bullmore,P.A.Nelson,S.Elliott и др, 1987. - 11 p. - Текст : непосредственный.