HD RADIO
HD Radio, which is in fact, digital radio, is the next evolution of free radio.
Just over a hundred years ago On Christmas Eve of 1906, Reginald Fessenden used an Alexanderson alternator and rotary spark-gap transmitter to make the first radio audio broadcast, from Brant Rock, Massachusetts. Ships at sea heard a broadcast that included Fessenden playing O Holy Night on the violin and reading a passage from the Bible.
30 years later, FM radio began, in 1933, FM radio was patented; Edwin H. Armstrong invented it. FM uses frequency modulation of the radio wave to minimize static and interference from electrical equipment and the atmosphere, in the audio program. In 1937, W1XOJ, the first experimental FM radio station, was granted a construction permit by the FCC. FM radio made stereo broadcasting possible and by the 1960's, FM stereo was on the air, by the late 1970's it surpassed AM radio.
Today, we have the next evolution. Being marketed as "HD Radio", local, free digital radio in the United States is a product of a company called iBiquity Digital. They describe HD radio this way:
"Radio for the 21st century. iBiquity Digital is the developer and licenser of HD Radio technology, which is transforming AM and FM broadcasting with vastly increased number of channels, drastically improved sound quality and an array of new data services. We are actively engaged with broadcasters; receiver, component and broadcast equipment manufacturers; automotive manufacturers; and retailers in the United States and around the world to ensure swift and successful adoption of HD Radio technology. This site features sections dedicated to each of these important partners in the AM/FM digital radio revolution."
In order to listen the HD Radio, you will need an HD receiver
HD Radio News
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