Public address system is an electronic sound amplification and distribution system. It works with the combination of a microphone, amplifier and loudspeakers,it will facilitate the person / recorded medium will address to large public / area, like announcements of movements at large area or on the Bus, rail and plane terminals.
Additionally it has the components of mixing console, amplifiers and loudspeakers for music as well as speech, it has the capability to use a sound source, as a recorded music or a person delivering speech and distributing the sound throughout the addressed venue or building.
Public address system is very important and compulsory for the small and large venues like school auditoriums, Malls, train / metro / airport / bus terminals. In simple terms Public address system is required to make announcements in public, institutional and commercial buildings