Beside the systems, noise can also occur simply by using the aircraft interior – such as from use of hatches, latches, door locks or by trolley handling in the galley. In some cases an audible feedback is required in order to alert the cabin crew that a door is properly locked, for example.
“The art is to identify the driving noise sources and how to treat them, and to what extent. This is not an easy task in a complex supplier environment where Airbus has reached excellence,” notes Petersen.
The good news for passengers flying in both the A330neo and the A350 is that these aircraft have fully integrated Airspace cabins. This means that the new panels, hatches, monuments, doors, galley equipment, etc. have all been designed and operationally tested to minimise potential noise events, as well as to suppress overall resonance and vibration. This is welcomed by passengers and crews, as the result is a quiet cabin during all phases of the journey - from boarding, take-off, cruise, landing, to taxiing back to the destination gate.