What's the difference between FM and AM in Radio Broadcasting System

FM (Frequency Modulation) and AM (Amplitude Modulation) are two types of radio broadcasting systems that transmit audio signals using different techniques. The primary distinction between FM and AM frequency is in the modulation of the audio signal onto the carrier wave.

In FM, the frequency of the carrier wave varies proportionally to the audio signal's amplitude. This indicates that the frequency of the carrier wave is increased when the amplitude of the audio signal is high and dropped when the amplitude of the audio signal is low. FM has the advantage of producing audio of greater quality with fewer noise and interference.

In contrast, the amplitude of the carrier wave varies proportionally with the amplitude of the audio stream in AM. This indicates that the amplitude of the carrier wave is increased when the amplitude of the audio signal is large and dropped when the amplitude of the audio signal is low. AM has the disadvantage of being more vulnerable to noise and interference, which can result in audio of lesser quality.

FM radio stations have a greater bandwidth than AM radio stations, allowing them to send more data in the same amount of time. FM radio can therefore transmit stereo sound, whereas AM radio can only transmit mono sound.

The modulation of the audio signal onto the carrier wave and the ensuing signal quality are the primary distinctions between FM and AM frequencies. FM generates audio of higher quality with less noise and interference than AM, which is more prone to noise and interference. FM radio stations have a wider bandwidth and can transmit stereo sound, but AM radio stations have a narrower bandwidth and can only transmit mono sound.

While FM (Frequency Modulation) is generally considered to provide higher quality audio with less noise and interference, AM (Amplitude Modulation) has some advantages in certain situations:

1. Longer range: AM signals are better suited for long-range transmissions because they can travel farther and penetrate through obstacles such as buildings, hills, and trees. This makes AM radio broadcasting useful for covering large areas with fewer transmitters.

2. Lower cost: AM radio broadcasting is generally less expensive than FM broadcasting because the equipment required for AM broadcasting is simpler and less complex than FM broadcasting.

3. Simpler technology: The technology used in AM broadcasting is simpler, which makes it easier to maintain and repair the equipment. This is particularly important in areas where resources are limited, and skilled technicians are not readily available.

4. More stations available: Because AM radio stations require less bandwidth than FM radio stations, more AM radio stations can be accommodated in a given frequency band, providing more listening options for listeners.

In summary, the advantages of AM frequency in radio broadcasting include longer range, lower cost, simpler technology, and the ability to accommodate more stations in a given frequency band. These advantages make AM broadcasting well-suited for certain situations, such as covering large areas with limited resources.