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What is a channel bandwidth?...

What is a channel bandwidth?

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The bandwidth of a signal refers to the range of frequencies occupied by the signal. It is measured in hertz.
The information communicated by a sigmal in a communication system can be of various types, such as voice, music, picture or binary data. Depending on the type of information, a signal occupies different range of frequencies. For example, voice or human speech ranges from about 300Hz to about 3100 Hz. Hence, the speech signals in commercial telephonic communication require a bandwidth of 3100 Hz-300 Hz-2800 Hz. The audible range of frequencies in humans is from about 20 Hz to about 20000 Hz. Thus, music signals to transmit sound from musical instruments require a bandwidth of `20000 Hz-20 Hz 20000 Hz or 20 kHz`. Video signals to transmit visual or picture information require a bandwidth of auoit 4.2 MHz.
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