I always thought that it was sound of the cavitating screws smashing against compartments of air and water, but never thought to ask anyone...you seemed an appropriate person to ask!
Well I can tell if a ship has a port of starboard list LOL. I’m not sure about cavitation causing it. If it were a fouled shaft or screw though I think CHENG would have stopped that one shaft. I remember America was the only carrier with a sonar dome in the bow. Every night at sea down in berthing at waterline it was like an old rocking chair or a screen door spring opening and closing. They removed it in the 80 overhaul.