Originally Posted by
Skepilot
The Airbus is designed so you can't accidentally talk to ATC when making a PA through the ACP, either! A nice improvement over the Boeings I've flown. Made it Pilot-Proof!
But you can still have a brain fart and press the PTT switch instead of the PA switch when you intend to make a passenger PA.................been there, done that.
By always using the handset for passenger PAs, you separate speaking to passengers away from the ACP in your mind, so it reduces that possibility. We can still use the PA switch on the ACP for emergency CC announcements.
Re: relative volumes, the PA volume is increased when the engine(s) are running. Maybe it increases differently depending which PA method is used, so you would only hear a difference in flight?