A public address system is a set of equipment used to amplify and distribute sound to a large audience. It typically includes microphones, amplifiers, speakers, and mixers, allowing speakers or performers to be heard clearly in large spaces, such as auditoriums, stadiums, or public events. The system is designed to project sound over long distances, ensuring that everyone in the audience can hear announcements, music, or speeches. Public address systems are commonly used in schools, concerts, airports, and other venues where clear communication with a large group is needed.

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