In terms of analog signal, bandwidth of the channel is the range of frequencies that the channel can carry. BANDWIDTH OF A CHANNELĪ channel is the medium through which the input signal passes. So, effective speech bandwidth is 3400 Hz – 300 Hz = 3100 Hz. For efficient transmission and reception of speech signal, 300 – 3400 Hz is sufficient. Note that transmission of all frequencies (20-20kHz) is costly. But the voice frequencies from 300 Hz – 3400 Hz are only transmitted in communications. The range of human voice (speech) is 20 Hz – 20 kHz. Also note that bandwidth of signal is different from bandwidth of the channel. Analog signal bandwidth is measured in terms of its frequency (Hz) but digital signal bandwidth is measured in terms of bit rate (bits per second, bps). In analog technology, the bandwidth is the difference between the lowest and highest frequencies that can pass through the channel. Voice signal, music signal, etc Type of the signalīandwidth of analog and digital signals is calculated in separate ways. Ideally channel should provide more bandwidth and signal must occupy less bandwidth.ĭifferent types of signals have different bandwidth. Note that greater the bandwidth of a channel, higher the data rate. Frequency range of the signal is known as bandwidth.It is one way of describing the maximum amount of information that the channel can carry.It may also be defined as the frequency range over which a signal is transmitted.Bandwidth can be defined as the portion of the electromagnetic (EM) spectrum occupied by the signal.It is defined as the range of frequencies that the signal occupies.Bandwidth is the difference between upper and lower frequency limits of the signal.
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