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موضوع انجليزي عن broadcasting

موضوع انجليزي عن broadcasting


موضوع انجليزي عن broadcasting


Technical
Broadcast is a term used for broadcasting standards and tools in the audiovisual field. In other words, a broadcast designates both a program, that is to say a program that presents information, and the action of making it public, which corresponds to broadcasting.


Broadcasting is the transmission of signals via electromagnetic waves intended to be received directly by the general public and applies to both individual reception and community reception. This service may include audio, television or other types of programming1,2,3. This is a form of radiocommunication.
The term radio is often used for the entire chain of design and production of radio broadcasts, transmission with radio transmitters and reception through radios
Transmission of sounds
Radio receiver.
Broadcasting defines the transmission of sounds: the human voice and the audio signals by the waves. In a radio transmitter, the sounds are transformed into low frequency electrical signals (modulation signals), they are superimposed on a high frequency wave (carrier wave) and sent into an antenna that transforms them into electromagnetic waves.

Low frequency broadcasting uses the so-called GO or "long wave" range, from 150 to 280 kHz. This range, historically the first used in broadcasting in Europe, still has transmitters

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