Yeah, the incredibly loud freewheel/freehub thing. it's annoying. Chris King hubs are the worst. Sounds like some sort of party buzzer - or maybe the old Cox model airplane engines. Would drive me bonkers. My White T11 was a bit loud for me. Fixed it with Phil...

Vintage freewheels generally were pretty quiet, some more than others. I don't any that even remotely compare to today's noismakers. Regina CX were super quiet, it was kind of their thing, and at the time a selling point. They were OTOH slightly less reliable than the earlier Oro. Shimano freehubs were always pretty quiet.

Phil tenacious oil makes them all quieter. I have a bottle for the sole purpose of oiling freewheels and freehubs.

Carbon bikes are great resonators for sure. Amplify everything. That's partly why I don't ride carbon, possibly the biggest part.