Radio broadcasting Types

radio broadcasting by radio takes several forms. These include AM and FM stations. There are several subtypes, namely commercial fm broadcast , non-commercial educational (NCE) public broadcasting and non-profit varieties as well as community radio, student-run campus radio stations and hospital radio stations can be found throughout the world. Many stations broadcast on shortwave bands using AM technology that can be received over thousands of miles (especially at night). For example, the BBC, VOA, VOR, and Deutsche Welle have transmitted via shortwave to Africa and Asia. These broadcasts are very sensitive to atmospheric conditions and solar activity. Arbitron, the United States-based company that reports on radio audiences, defines a "radio station" as a government-licensed fm transmission or FM station; an HD Radio (primary or multicast) station; an internet stream of an existing government-licensed station; one of the satellite radio channels from XM Satellite Radio or Sirius Satellite Radio; or, potentially, a station that is not government licensed. Shortwave See Shortwave for the differences between shortwave, medium wave and long wave spectra. Used largely for nationalwhat is radio transmitter , international propaganda, or religious broadcasting organizations.