[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3923 : Sound transmission control by using piezo-electric actuators : Rep.presented at AIAA 13th aeroacoustics con.,Oct.22-24,1990,Tallahassee,Fl. / A.AkishitaHo Gil Lee, 1990. - 7 p. - Текст : непосредственный.