Re: "Silent" Ukemi
Agree with the core strength is very important. And also your flexibility helps your lower your centre of gravity while your foot is still in touch with ground. I saw an old aikidoka practically already on mat before the actual "roll/fall" in kategaeshi. It might not be good in martial sense. But it sure will save the wear and tear of old bones while still taking a "breakfall" without nage have to change throw technique.