To simply put, PA or public address system is basically about the amplification of human voice with the help of different devices such as microphones, loudspeakers, amplifiers and other relevant equipment. In such cases where we need additional support to address a large mass of individuals, we seek for proper public address system.
In Public address systems microphone is used for converting sound pressure into equivalent electrical signal. You can connect and use two or three microphones together with one auxiliary input for tape.
Mixer is used for isolating various channels from each other before sending them to the amplifier.
For further amplifying the mixture output, voltage amplifier plays an important role. The power amplifier is driven by drive amplifier, in order to produce more power.
Avoiding acoustic feedback
Uniform distribution of sound intensity
Reducing resonance
Using accurate speaker orientation
Selecting right speaker and microphone
Creating a direction sense
Proper grounding
Using closed ring connection for speakers
Adequate output power
Number of microphones
Arrangement for connecting CD player or tape recorder
Equalizer circuit
Facility to use DC batteries in case the power fails
Number of loud speakers
Size, weight and cost of all the equipment
There are various shapes and sizes of public address system available in the market; it can be an expanded system which is suitable for large places like stadiums or a simple and portable system with single microphone attached with the home stereo.
We can consider a megaphone as a funnel, directing your voice or any kind of sounds towards the target with less chance for sound to scatter in unexpected directions. It is also useful for increasing the loudness or volume output. It’s time to explore the modern form of technology and you can use the systems in your way.