Aircrafts’ taxi noise. Sound power level and directivity frequency band results

When noise mapping airports, the main noise sources are take offs and landings. But aircrafts’ taxi noise can also be important, and should be considered, for instance when there are residential buildings near the airport’s terminal. Main prediction tools, like Integrated Noise Model (INM), do not consider taxiing and standard outdoors noise predictions software applications must be used, to model taxi as industrial noise sources. This technical note shows frequency band sound power levels and directivity data for several aircrafts’ classes; so that an acoustic consultant can include taxi for noise mapping an airport.