Over the last decades and since the’60 s, civil aircraft noise has been mitigatedsignificantly:theacousticalenergyemittedbyaveragemoderncivilaircraft—directlyrelated to the noise it is responsible for—is somehow only 10% of an aircraft of thesame size in the’60 s. This success was made possible thanks to specific researchefforts which focused on reducing the aircraft noise at its source…