CONSTRUCTION OF A RECHARGEABLE WIRELESS PUBLIC ADDRESS SYSTEM
Abstract
Abstract
This work is on a wireless amplifier. It has become inevitable that there would be
communication and due to the inherent limitation of the human voice, the Public Address
System came to being. A public Address System (PA) is an electronic sound amplification and
distribution system with a microphone, amplifier and loudspeakers, used to allow a person to
address a large public, for example for announcement of movement at large sound noisy air
and rail terminals. Public Address System is often used in small venues such as school
auditorium, churches, and small bars. PA system with many speakers are widely used to make
announcement in public, institutional and commercial buildings and locations. Intercom
system, installed in many buildings, have microphone in many rooms allowing the occupants
to respond to announcement.
The voice signal is passed through a microphone, which converts the sound energy to electrical
energy, the energy electrical signal being transmitted is being received and amplified by the
amplifier circuit. The amplifier output feed into the loudspeaker which converts the electrical
energy back to the original form but amplified sound energy. This report is made up of the
power supply unit, the pre-amplifier and power amplifier units, and the tone control unit. This
system is capable of delivering electrical power into an eight (8) Ohm load (loudspeaker)
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