"Digital radio comes belatedly to America"
"Like DAB, HD Radio removes the hisses and whistles from an AM signal, making it sound more like FM. Applied to FM, it delivers audio as pin-sharp as a CD. But the killer feature of HD Radio is not so much the quality of its sound, but the way it saves broadcasters from having to seek a separate set of frequencies—and pay additional licence fees—when adding digital channels to their programming."
http://www.economist.com/science/displaystory.cfm?story_id=9314581
Farce !
"Like DAB, HD Radio removes the hisses and whistles from an AM signal, making it sound more like FM. Applied to FM, it delivers audio as pin-sharp as a CD. But the killer feature of HD Radio is not so much the quality of its sound, but the way it saves broadcasters from having to seek a separate set of frequencies—and pay additional licence fees—when adding digital channels to their programming."
http://www.economist.com/science/displaystory.cfm?story_id=9314581
Farce !