Patent ID: 8556544

Claim:
An arrangement for an aircraft for adapting the transportation behavior of material to be conveyed, wherein the arrangement comprises: at least one first container coupleable to a first pressure level; at least one second container coupleable to a second pressure level; a connecting line for transporting material to be conveyed from the at least one first container to the at least one second container; a first actuating valve for coupling the at least one first container to the connecting line; a pressure reduction device for noise reduction wherein the pressure reduction device comprises at least one controllably variable ventilation unit, the pressure reduction device being at or downstream of the at least one second 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 second container; and wherein the pressure in the at least one second container is configured to be increased before changing the first actuating valve 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 second 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; a compressor element between the second pressure level and the at least one second container to generate negative pressure in the at least one second container if the pressure difference between the first pressure level and the second pressure level is not sufficient for transporting the material.