Radio Broadcasting, Technology Of
Any discussion of the technology of radio broadcasting must, at the outset, acknowledge its rapidly changing nature. The almost exponentially increasing effect of computers is being felt in the domain of radio as it is in most other areas. Although computers have not replaced all of the tools in use in radio broadcasting by any means, they have greatly enhanced the effectiveness of most, if not all, of them.
Microphones
There are a number of tools used to introduce various signals into a broadcast system, and the microphone remains one of the most basic of these input tools in use in radio. The microphone is an instrument used to transduce, or convert, acoustic energy into electric energy. During this process, sound waves are changed into electricity that can then be sent through wires as variations in voltage. There are three types of microphones that are preferred by professionals: moving coil, ribbon, and condenser. These are also often referred to as dynamic, velocity, and capacitor microphones, respectively. Each produces the waveforms that are required for transmission in a different manner.
The moving-coil, or dynamic, microphone is the most widely used due primarily to its durable and rugged design and good frequency response to voices and most music.
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