Why FCC is concern about FM over modulation?

The FCC is concerned about FM over modulation because it can lead to interference with other radio services and disrupt communication in the broadcast spectrum. Over modulation can cause distortion and degrade sound quality, potentially affecting the listener's experience. Additionally, excessive modulation can violate regulatory limits, which helps maintain orderly and fair access to the airwaves. This ensures that all broadcasters operate within defined parameters to minimize interference and maintain service quality.