Patent ID: 8690487

Claim:
An arrangement for an aircraft for adapting the transportation behavior of material to be conveyed, wherein the arrangement comprises: a first container and a second container coupleable to a first pressure level; at least one third container coupleable to a second pressure level; a connecting line for transporting material to be conveyed from the first and second containers to the at least one third container, wherein the connecting line connects both the first and second containers to the third container; a first actuating valve and a second actuating valve for connecting the first and second containers to the connecting line, respectively; and a pressure difference reduction device for noise reduction arranged at the connecting line and comprises at least one controllably variable ventilation unit, the pressure difference reduction device being between both the first and second containers and the at least one third container, wherein the at least one ventilation unit is configured to control the pressure difference between the first pressure level and the at least one third container; wherein the pressure in the at least one third container is configured to be increased before changing at least one of the first and second actuating valves from a closed state to an open state, which open state is adapted to start the transportation process such that the pressure difference between the first pressure level and the at least one third container is kept constant to generate a constant suction for transporting the material to be conveyed and the transport speed of the material to be conveyed is reduced, as a result of which noise generation is reduced; and a compressor element between the second pressure level and the at least one third container to generate negative pressure in the at least one third container if the pressure difference between the first pressure level and the second pressure level is not sufficient for transporting the material.