The An-22 came overhead London at about 1am maybe 10 years ago. It was operating from Brize Norton to the Middle East, presumably with some outsize cargo. It was probably audible for some 10 minutes, maybe more.
It's the same powerplant and props as the old Ilyushin 114 long range passenger aircraft, and the Tupolev 16 Bear bomber, still very much around, so the sound can still be experienced..