Loudest Sound Ever?

I saw twin V12 2 stroke Detroit on fuel, Blower, fed by a pair of BIG turbos at the tractor pulls. There was a couple of Cats and John Deere too. The big cat was 4 stroke, you felt it 1/4 mile away no problem.

But that Detroit with open exhaust I don't see how the operator could stand it. I sure couldn't. There was so many noise complaints, that never happed again.. LOL

Made a Merlin gas engine sound like a toy.. and they are loud too with open headers.

The explosion of the French munitions ship SS Mont Blanc in Halifax, Nova Scotia on Dec. 6, 1917. Over 2000 dead and 9000 injured. Blast equivalent to 2..9 kilo tons of TNT. This was the largest man-made explosion at that time!

The Who
Carter Finley Stadium 1989

Lumen Field (Centurylink Field), Seahawks home games: sustained SPLs 125+ dB. 
I’ll watch at home thank you. 
Once in my youth I fired a 357 Magnum, having forgotten to put on ear protection - took two days to hear correctly, and likely did some long-term damage.