Communication Course/Printable version
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Information
Information is a communication term used to describe any of the following entities
- Audible Sound in the frequency range of 2kHz - 20 kHz . Example human animal sound
- Audible Voice in the frequency range of 3kHz - 30 MHz . Example human speech conversation
- Video in the frequency range of 30Hz - 30 GHz . Example Tivi motion picture
- Data in the frequency range of 2kHz - 20 kHz . Example Computer data
Information ProcessingEdit
Information exists in many wave forms generate from different sources. Before information can be processed by electronic devices information needs to be converted to electronic waves forming a signal. Then signals can be processed by electronic devices to amplify the signal, with the volume controlled by adjusting the amplitude of the signal.
Signal
Electronic SignalEdit
Information exists in many wave forms generated from different sources. Before information can be processed by electronic devices information needs to be converted to electronic wave forms called signals. Then signals can be processed by electronic devices to amplifying the signal, with volume controlled by adjusting the amplitude of the signal.
Types of electronic signalsEdit
- Sine wave
- Square wave
- Triangular wave
Signal Processing
ModulationEdit
Sound, voice
Types of ModulationEdit
SamplingEdit
Transmitting Medium
WiresEdit
Communication signals travel through wire as radiated electromagnetic wave to receiver
AirEdit
Communication signals travel through the air as radiated electromagnetic wave to receiver
Communication Devices
Communication DevicesEdit
In computer technology field, communication devices may mean such things as sound cards, internet cards, modems and some other examples of computer interfaces.