Frequency modulation is primarily used for the wireless transmission of intelligence, avoiding interference associated with what type of modulation?

Frequency modulation (FM) is predominantly utilized in wireless transmissions to carry audio and other information because it provides significant advantages over amplitude modulation (AM), particularly in terms of resistance to interference.

In amplitude modulation, the strength of the signal is varied in relation to the amplitude of the incoming wave, meaning that signal quality can suffer from distortions caused by noise, which may result from various environmental factors or other electronic devices. Since noise typically affects signal amplitude, an increase in unwanted signals can disrupt the clarity of the transmitted information.

In contrast, frequency modulation encodes the information in the variations of the frequency of the carrier wave rather than its amplitude. This method makes FM signals more robust against noise and interference, especially from static or nearby electrical devices, because such interference would need to match the frequency variation to affect the received signal significantly. As a result, FM is favored for high-fidelity audio transmission and other applications where clarity and resistance to interference are crucial.

Choosing frequency modulation effectively leverages these properties, allowing for clearer communication over longer distances, making it the preferred choice for radio broadcasting and similar applications.