That is probably right, but I grew up near a B-52 that used to test the new JT9-D engine in Connecticut, and I still think the F-111 I heard at Cannon were louder! :)
However, that B-52 I saw never took of with bombs from the airport I was near.
(I still think the F-111 I heard at Cannon were louder!)
I worked on the F111-D’s at Cannon from 1976 - 1980.
Great airplane...once the bugs were worked out.
The loudest plane I heard during my tour was when I was on TDY in England. The RAF Lightning...that was one loud plane!