The public address system (or PA system) is the electronic system connecting the system owner with the public. For example, if the business team wants to inform the public about something or announce an emergency, employees use PA systems. The public addressable system distributes the sound through the assigned venue or building. The system is suitable for background sounds as well as speech. It involves microphones, amplifiers, speakers, and many related components and equipment mentioned below.PA Systems are necessary in emergency times There fore, modern business buildings shouldn’t go without using one of the types of public address systems.