(FM) an acronym for Frequency Modulation is a type of signal modulation in which the frequency of a carrier wave is varied in accordance with the amplitude of an input signal. FM signals are used for a variety of applications, including radio broadcasting, two-way radio communication, radar systems, and sonar.
The main advantage of FM over other types of modulation is that it is much less susceptible to noise interference. This is because the amplitude (or loudness) of an FM signal does not affect its frequency. As long as the input signal remains above a certain threshold level, the output carrier wave will maintain its frequency. This makes FM ideal for use in noisy environments where other modulations would be unusable due to interference from background noise.
FM also has better sound quality than AM due to its higher bandwidth (the range of frequencies it can carry). This allows for more information to be encoded into an FM signal, resulting in better fidelity when reproduced by a receiver.