For the transmission of audio signals at distant places , the high frequency carrier waves are used, because these frequency carrier waves travel through space or medium with the speed of light and they are not obstructed by earth’s atmosphere.
Read moreWhat is carrier frequency in frequency modulation?
Frequency Modulation, FM. When the audio signal is modulated onto the radio frequency carrier , the new radio frequency signal moves up and down in frequency. The amount by which the signal moves up and down is important. It is known as the deviation and is normally quoted as the number of kilohertz deviation.
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