Public address systems should not be confused with a paging system. The latter is normally built into the telephone system. In this type of system, the paging facility acts as a liaison between the telephone and PA amplifier. On the other hand, the public address system acts as voice alarm system that has separate cable connections of its own especially for large systems. Another equipment of the same type is the Portable pa system that also has a number of variations.
There are hand held units that can be carried by a person wherever he goes. Another type is a setup consisting of a speaker, microphone, and amplifier. This is used in areas where a large gathering of people is present. There are also models that incorporate the pa system with a lectern for formal functions. With plenty of audio visual accessories, sound engineers are continuously developing efficient pa systems that are not only functional but also economical.
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