That diagram/faux graph makes me a little suspicious.
Given most of the markers are pretty meaningless (OK not the db bits. But a card door slam? What kind of can and how hard - slightly or wife just found you getting a blow job in the car hard? Ditto baseball bounce on grass, from hand or smacked by a pro etc etc And I'm assuming the value for the plane is at its cruising altitude, what about when its a lot closer to the ground and driving its engines at full power to get up there.
And as for son of Concorde - not even close until its big enough for a lot of passengers when I imagine it will be a lot louder.
I'm interested to see the results but I'm not sure it will make a commercial plane or even something for the military - by the time its radar proofed its going to be loud again,