I subsequently worked with a Concorde when I worked at the Science Museum in London and I must say I fell a bit in love with it. It had a wonderful mix of glamour and geek that completely struck a chord.
However, Concorde really wasn't the worst offender. The 747s delivered a noticeably deeper and more earthshaking thunder.
I am aware this is completely anecdotal, and that once supersonic, the Concorde would drown out anything Boeing.
The KCs used water-augmentation (I think) on takeoff with a full fuselage of fuel, and honestly sounded like the sky was made of 100 layers of cotton and someone was tearing them apart with their hands. 2 solid minutes of "hey, they're ripping the sky again" and the water would run out and they'd sound like a normal heavily loaded Boeing chassis again.
Miss it still
I don't care if Concorde was uneconomic. Some things you should do just because they're beautiful.
Its said that once a USAF pilot saw the Vulcan manoeuvring and remarked that it was awfully big for a fighter...
Not sure if the Vulcan was supposed to deter the Soviets with its nukes or simply scare them to death.
Edit: The Vulcan wasn't just loud in the "strategic bomber" sense of loud - it also sometimes generated a completely unearthly howl that it is famous for. Combine the engine noise and the howl and it really was quite a monster.
Just a shame it was originally built to kill millions of Russians. I know military investment produces all kinds of awesome technology, but... we could be better than that. And that's something Concorde felt like it represented.