Megaphone Can Be Effective Equipment to Address Small Gatherings

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.

Microphone

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

Mixer is used for isolating various channels from each other before sending them to the amplifier.

Voltage, driver and power 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.

Essentials for public address system

• 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

When selecting a PA system you should consider about

• 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.

Note:

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.