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Why is frequency modulation preferred over amplitude modulation for transmission of music?
Wiki User
∙ 11y ago
FM provides noise immunity, whereas AM is easily affected by noise.
With FM, the amplitude of the sound is converted into a shift in frequency. So the volume is limited by the bandwidth, but the frequency of the sound can vary as much as it likes, giving a higher fidelity sound.
Spikes induced on the signal usually affect the amplitude of the signal. The amplitude of an FM signal is not used in the demodulation process and is therefore immune to spikes in the signal.
AM was first used in radio because it is very easy to achieve using basic components. A single rectifier only, is needed to recover the audio.
FM is quite a complicated process and could only be achieved once electronics had progressed.
Wiki User
∙ 12y ago
Wiki User
∙ 11y ago1 FM is more robust than AM with respect to interferences.
2 FM has been developed later than AM, so it has been given a bigger bandwidth (88-108kHz vs 535-1705kHz) and, thus, its quality is higher (roughly 2400v1200 bps).
Wiki User
∙ 11y agoF.M. transmission gives higher fidelity reception than A.M. transmission
due to the presence of a large number of sidebands.
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