What term is used for announcements made to passengers onboard the aircraft?

The correct term for announcements made to passengers onboard the aircraft is "Public Address." This term encompasses any official communication directed at passengers from the flight crew, typically using the aircraft's PA system. These announcements can include important safety information, flight updates, and service notifications, all aimed at ensuring passengers are informed about their flight experience.

While "Cabin Address" may sound relevant, it is not a widely used term in the aviation industry and does not specifically denote the system used for announcements. "Flight Announcement" could be seen as a close alternative, but it lacks the formal recognition and applicability of "Public Address" in the context of aviation communications. Similarly, "Passenger Notification" is too vague and does not specifically refer to the system of announcements made during the flight. Thus, "Public Address" is the most accurate and accepted terminology for this function within an aircraft setting.