DEVICE FOR ACOUSTICALLY TREATING TURBINE AND COMBUSTION NOISE
A device for acoustically treating the internal structure of a turbojet nacelle primary jet pipe, the structure comprising an upstream region (Z1) and a downstream region (Z2) with respect to the direction in which air flows through the primary jet pipe, the upstream and downstream regions being positioned one on each side of a dividing wall (3) a first face of which faces the upstream direction and a second face of which faces the downstream direction, characterized in that the dividing wall (3) is a microporous wall and in that the downstream face of the dividing wall (3) is covered with a honeycomb structure (6) to attenuate high-frequency sound waves. Application to the treatment of combustion and turbine noise.