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  2. HD Radio - Wikipedia

    en.wikipedia.org/wiki/HD_Radio

    HD Radio is used primarily by AM and FM radio stations in the United States, U.S. Virgin Islands, Canada, Mexico and the Philippines, [citation needed] with a few implementations outside North America. HD Radio transmits the digital signals in unused portions of the same band as the analog AM and FM signals.

  3. Broadcast radio receiver - Wikipedia

    en.wikipedia.org/wiki/Broadcast_radio_receiver

    Its advantages are that DAB has the potential to provide higher quality sound than FM (although many stations do not choose to transmit at such high quality), has greater immunity to radio noise and interference, makes better use of scarce radio spectrum bandwidth, and provides advanced user features such as electronic program guide, sports ...

  4. FM broadcasting in the United States - Wikipedia

    en.wikipedia.org/wiki/FM_broadcasting_in_the...

    By the end of the 1970s, 50.1% of radio listeners were listening to FM stations, ending AM's historical lead. By 1982, FM commanded 70% of the general audience, and 84% among the 12- to 24-year-old demographic. [17]

  5. AM broadcasting - Wikipedia

    en.wikipedia.org/wiki/AM_broadcasting

    AM radio offered the highest sound quality available in a home audio device prior to the introduction of the high-fidelity, long-playing record in the late 1940s. Listening habits changed in the 1960s due to the introduction of the revolutionary transistor radio (Regency TR-1, the first transistor radio released December 1954), which was made ...

  6. List of 50 kW AM radio stations in the United States

    en.wikipedia.org/wiki/List_of_50_kW_AM_radio...

    The following is a list of radio stations in the United States that are authorized to run 50 kW (50,000 watts) of power. This is the highest power authorized to any AM station in the United States. Power Legend: U=unlimited time, D=daytime power, N=nighttime power, CH= critical hours power.

  7. These Are the Best Emergency Radios to Keep You Updated ...

    www.aol.com/best-emergency-radios-keep-updated...

    The NOAA broadcasts weather warnings and forecasts as the National Weather Radio (NWR) across seven public radio frequencies: 62.400 megahertz, 162.425 MHz, 162.450 MHz, 162.475 MHz, 162.500 MHz ...

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