Definition
An electronic sound amplification setup — typically a microphone, amplifier, and one or more loudspeakers — used by a speaker to project their voice clearly to a large audience in a room or hall.
Plain English
A microphone-and-speaker setup that makes the instructor's voice loud enough for everyone in a big room to hear.
Context Anchor
In aviation instruction, this term appears when discussing lectures, classroom teaching, airport briefings, and other situations where one speaker must be heard by a group.
Derivation
Public' comes from the Latin publicus, meaning 'of the people.' 'Address' here means to speak to. So a public address system is simply equipment for speaking to a public — a group of people gathered in one place.
Why Pilots Care
Enables clear communication of critical safety information to all occupants without requiring individual headsets.
Intuition Check
It does not refer to a general building or airport sound system; in aviation it specifically means the aircraft's internal announcement equipment.
Example Sentence 1
Before the safety seminar began, the instructor tested the public address system to make sure students at the back of the hangar could hear.
Example Sentence 2
During the safety demonstration, the flight attendant spoke through the public address system.