You don't have to be hard-of-hearing to struggle with that. A PA system that actually worked would be lovely at most airports. I can't remember a time when I was waiting at a gate and could actually hear what the gate attendants were announcing; it's either completely silent, like their microphone isn't even on, or it's distorted so badly by the garbage equipment and accoustics that it just sounds like the teacher in Charlie Brown.
If I were older or less mobile, I'd be even more incensed by the way airports seem to have such a penchant for putting up blatantly false gate information more than about 45 minutes before the flight is scheduled for takeoff. The last three times I've had to connect somewhere, I've gotten off my incoming flight, looked up the gate for my next leg, power-walked a half-mile or more to the opposite end of the terminal, or had to leave and go to a different terminal - only to get there, relax for a few minutes, and notice that the gate information has changed and now the gate is two or three away from where I started, and I've got to burn tire to get back there.