My recollections of the -30 & -15 were that it was uncannily quiet, or has my memory faded so much with time ? The Fokker 100 would be too, if it wasn't for these dirty great fans that cut in at 1000' on the climb.
After 20 odd years on the 737 (7 on NG) I still pass my Audiogram having used the flimsy non ANR headsets provided by my respective employers. . . maybe I have just been lucky ? ? sorry. . . . could you say that again. . .what ?