HD Radio (hybrid-digital radio) provides clear, near FM quality AM radio reception and also provides FM radio reception that rivals CD audio quality. The cool factor is the FM subchannels (not available in AM HD) for carrying content different than the main signal. That means an HD FM radio station could carry soft rock on its main signal, while one of its subchannels carries live sports events. Very cool.
Listening to HD is free (the cost for needed equipment, upgrades and the like is up to the station). There are more than 2,000 HD radio stations and more than 1,000 subchannels in the US.
You’ll need to buy a HD Radio if you want HD features. We tried a small FM portable HD radio from Insignia (www.insigniaproducts.com, $50), and the local FM HD radio stations did sound clearer than standard FM stations, and we enjoyed having the subchannel content so readily available.
Since almost all HD stations transmit a “hybrid” signal containing both a standard signal and the HD signal, your old radios still works fine, but you won’t have the HD features.
If you want to know more about HD Radio, go to our web site at http://www.norma-tony.com/031010.htm
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