Just from past experience when I used to program radio stations, I know that women handle noise or annoyance differently from men; they will react differently. As well, we've come through an era—I would call it the ear-damaged generation—when people have been subjecting themselves to very loud stereos in their cars or personal devices and everything else.
You would wonder whether perhaps part of what you're experiencing, with the level of complaints going up even with quieter planes, is with people who have somehow altered their hearing with these other devices, making them more susceptible to the noise. I'll ask you to comment on that.
Also, if you're a member of the flight crew and you're in the cabin, you're dealing with a constant level of noise throughout the whole journey, whereas if you're on the ground, it's sporadic. There's noise, then there isn't noise, and then there's noise again. Has that been examined in the course of trying to come up with an overall management plan for noise at airports?