Loud...
Living on base in side the pattern as 7 F-4s circle the pattern practicing FCLPs (touch and goes on a simulated carrier deck). a calm wind helped create a smokey black ring around the pattern to compliment our temporary deafness.
A low flying fighter breaking the sound barrier will catch your attention too.
The A-6 was not so quiet either.
Try an old B727 long hauler loaded with fuel and cargo, old and tired engines that might take a little more throttle is plenty loud climbing low and slow off the departure end. A recent noise complaint claimed such a departure blew over trash cans in their residential neighborhood.
