a method of transmitting information using a radio-frequency carrier wave. The frequency of the carrier wave is varied in accordance with the amplitude and polarity of the input signal, the amplitude of the carrier remaining unchanged
Abbreviation: FM. Compare amplitude modulation
frequency modulation in American English
1.
the variation of the frequency of a carrier wave in accordance with the signal being broadcast
2.
a broadcasting system that uses this
see also amplitude modulation
frequency modulation in Electrical Engineering
(frikwənsi mɒdʒəleɪʃən) or FM
noun
(Electrical engineering: Communication, Analog)
Frequency modulation is a process in which the frequency of the carrier is controlled by the modulating signal.
Frequency modulation is less error-prone than amplitude modulation as a broadcast means.
The broadcast of a single signal, such as a monophonic audio signal, can be doneby straightforward amplitude modulation or frequency modulation.
Frequency modulation is a process in which the frequency of the carrier is controlled by the modulatingsignal.