Communication is an important part of interaction especially with humans. The most effective form of communication is through sound. It has to reach a certain number of people to determine if the method of communication is effective. The use of a Portable pa system is an effective means to communicate with more than one person. The main function of a public address system is to convey information. If the information has to be transmitted to more people at the same time, it must be done using communication equipment.
Technology plays an important role in making public address system effective. There was a time in history when someone who likes to talk to a crowd would have to climb up an elevated place and shout at the top of his voice. This is an energy consuming method and very stressful to the vocal chords. The top of the line electronics equipment made this scenario just a thing of the past.