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Radio and Radio Broadcasting Defined
✓ It is device for receiving or sending sound messages. The word "radio"
is derived from the Latin word "radius", meaning "spoke of a wheel,
beam of light, ray". It was first applied to communications in Radio
broadcasting
✓ The term radio broadcasting means the transmission of audio content
using radio- frequency wave.With the recent technological advancement we have today, many types of
content distributions are being offered for information dissemination.
➢ Analog Radio- Consist of two main types:
- AM radio (Amplitude Modulation) – Am radio signals vary their
amplitude to adapt to their sound information that is being
broadcasted through wavelengths. - FM radio (Frequency Modulation) – sound is transmitted through
changes in frequency.
➢ Digital Radio- is the transmission and reception of sound
processed into patterns of numbers, or digits. Hence the term digital
radio in contrast with analog radios process sounds into pattern that
resembles sound waves.➢ Internet Radio- the use of online streaming audio services to
provide a simulated broadcast of the over-the-air signals to web
listeners.