Public address system is a set of the electric equipment used to reinforce a sound source so that it can be heard through a venue or building. The wide range of the public addressing systems includes microphones, speakers, power amplifiers, conference systems and various others. With the help of a PA system, a person can address the other person or a crowd at a greater volume that wouldn’t be possible without such a system.
PA systems with numerous speakers are used extensively in the institutional, commercial and industrial buildings to read a public announcement, especially to declare the states of emergency. Offices and other workplaces use microphones in every room to maintain a communication channel with the central office.