What Is PA System ?
A public address system (PA system) is an electronic amplification system with a mixer, amplifier and loudspeakers, used to reinforce a sound source, Simple PA systems are often used in small venues such as school auditoriums, churches, and small bars. PA systems are used in any public venue that requires that an announcer, performer, etc. 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.
Working Of PA System
The goal of a PA system is to provide "public address", or a way to transmit audio communication to a group. This transmission can begin with a microphone, which is a device that can assist in magnifying an audio source's volume. A microphone is classified as a device that transforms sound into an electrical signal. Microphones used in PA systems are usually dynamic or condensers. Dynamic microphones are more rugged than condensers and are able to withstand the elements a little better. Condenser microphones utilize their own power source and produce better-quality audio signals, but can sometimes be so sensitive that they also receive background noises.