comparison of am and fm




there is the AM band of frequencies. These are electromagnetic waves with frequencies between 535 kHz and 1605 kHz (where a “kHz” represents a kilo Hertz, or 1000 oscillations per second). The AM (Amplitude Modulation) method involves the encoding of the original sound through modulating or changing the amplitude of the radio signal, which is then decoded by the receiver to recover the original sound.

Each AM channel is assigned a range of frequencies, typically about 10 kHz wide. The common frequency identification (such as AM 1190 for America AM 1190) represents the midpoint of this operating channel range. Actually, the station uses only about 2.5 kHz on either side of this midpoint because of the interference problems outside. Therefore, the total bandwidth of an AM channel is typically about 5 kHz. The musical range of the human ear is about 20 kHz, and that is the reason why AM sounds imperfect.

Re: Comparison of AM and FM

Radio signals are electromagnetic waves that are sent from a transmitter to one or more receivers. All electromagnetic waves travel at the speed of light, but they can have different wavelengths and frequencies. Radio signals occupy certain ranges of the electromagnetic frequency spectrum.

First of all, there is the AM band of frequencies. These are electromagnetic waves with frequencies between 535 kHz and 1605 kHz (where a “kHz” represents a kilo Hertz, or 1000 oscillations per second). The AM (Amplitude Modulation) method involves the encoding of the original sound through modulating or changing the amplitude of the radio signal, which is then decoded by the receiver to recover the original sound.


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