PUBLIC ADDRESS SYSTEM
A PA system, or Public Address system, is a set of electronic equipment used to amplify and distribute sound over a wide area, such as in a public space, a stadium, or a building.
A typical PA system includes a microphone or other input device that captures sound, an amplifier that increases the volume of the sound, and a set of speakers that distribute the sound to a wide area.
PA systems are commonly used in a variety of settings, such as for announcements in public spaces, paging systems in office buildings, they are also commonly used in emergency situations, such as to broadcast evacuation instructions during a fire or other crisis.
PA systems can be either wired or wireless, and can vary in size and complexity depending on the needs of the application. They are an important tool for communication and entertainment in many different settings, and can help to ensure that important messages are heard by a large number of people.