diz a Business Week:

«Five years after winning FCC approval, HD (hybrid digital) Radio is still a mystery to most consumers. Pricey HD receivers, most of which cost upward of $200, have caused many potential listeners to tune out—despite the support of major broadcasters including Clear Channel Communications (CCU), who have boosted the quality of existing stations by using analog-digital transmitters and created hundreds of HD subchannels. In a survey released May 23, radio researcher Bridge Data estimates there are only 450,000 weekly listeners of HD Radio—compared with 15 million satellite subscribers and 57 million Internet radio listeners. (About 93.5% of all Americans tune into traditional radio every week.) "A majority of Americans are now aware of the term HD Radio. But fewer than 5% of them understand what it is, what is the benefit," says Dave Van Dyke, CEO of Bridge Data. Still, 40% of respondents expect to listen to HD Radio more frequently in a year.» (fonte: «Trying to Figure Out HD Radio», Douglas Macmillan, 29/5/07, Business Week)