The factor that will have an effect on the spacing of the sidebands is letter B. Frequency modulation is already common for radio communications. Even with all of the technologies that were created over the past years, this is still one factor that cannot be denied. This can make use of digital and analog signal in order to showcase the frequency waves.
Aside from radios, frequency modulations are also used by hearing aids in order to project sounds to those who are using them. The frequency modulation system is usually simple consisting only of a microphone and the receiver.