Why is the VHF frequency range often preferred for FM radio?

The preference for the VHF frequency range in FM radio largely stems from its favorable propagation characteristics. VHF, which stands for Very High Frequency, typically ranges from 30 MHz to 300 MHz. This frequency range is effective for FM broadcasting due to its ability to support line-of-sight transmission.

FM signals in the VHF range are less prone to interference from static, noise, and other electronic devices compared to signals at lower frequencies. Additionally, VHF waves can effectively penetrate through environmental obstacles like buildings and trees, allowing for clearer and more reliable reception. This capability enhances the overall listening experience, as the sound quality tends to be more consistent and stable in such an environment.

While some might consider factors like sound quality or distance, the unique propagation characteristics of VHF frequencies fundamentally make them ideal for FM radio broadcasts, enhancing the reliability and quality of the service. Other radio frequencies, especially those below VHF, may face challenges in maintaining consistent quality and coverage, primarily due to the long-range propagation behaviors and other interferences.