What is Public address system?
[[File:Pa system.jpg|thumb|PA system]] A '''public address system''', commonly known as a '''PA system''', is a [[network]] of [[sound]] [[device]]s that can play sound to several people. They are often used to make [[wikt:announcement|announcements]] in large buildings or neighbourhoods. In big spaces outdoors, [[amplifier]]s and [[loudspeaker]]s have to be very loud. Otherwise the [[volume]] would be too small to be heard by everybody. {{Commonscat|Public address systems}} [[Category:Electronics]] [[Category:Audio technology]] [[Category:Sound]] {{tech-stub}}