A microradio movement surfaced in the 1990s and raised the ire of both broadcast regulators and the industry; these microstations are referred to as:

Question

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LPFM stands for Low Power FM, which describes the type of microstations that emerged in the 1990s. These stations operate on a low power output and are not licensed by the FCC, which caused regulatory and industry backlash. HDFM, MPX, and AOR are not related to this topic.

A Microradio Movement Surfaced in the 1990s and Raised the Ire