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Communication to Public for Important or Emergency situation
A public address system (PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument or other acoustic sound source or recorded sound or music. PA systems are used in any public venue that requires that an announcer or automatic be sufficiently audible at a distance or over a large area. Typical applications include sports stadiums, public transportation vehicles and facilities, and live or recorded music venues and events. A PA system may include multiple microphones or other sound sources, a mixing console to combine and modify multiple sources, and multiple amplifiers and loudspeakers for louder volume or wider distribution.
PA systems with many speakers are widely used to make announcements in public, institutional and commercial buildings and locations—such as schools, stadiums and installed in many buildings, have both speakers throughout a building, and microphones in many rooms so occupants can respond to announcements. It is majorly used as part of an emergency communication system both manually and automatically against integration with Fire Alarm and Detection system.
