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Frequency Modulation


Frequency modulation (FM) is a method of modulating a radio frequency carrier wave by varying its frequency in response to a modulating signal.


In FM, the modulating signal is typically a low-frequency audio signal. The audio signal is used to vary the frequency of the carrier wave in a way that reflects the information being carried.

In contrast to amplitude modulation (AM), FM is less susceptible to noise and interference, and can provide higher-quality sound for a given signal-to-noise ratio. However, it also requires a wider bandwidth than AM, which can limit its usefulness in certain applications.


  1. Sky and space wave propagation
  2. Amplitude modulation
  3. Communication Bandwidth
JEE Physics Solved Problems in Mechanics