Here is the way:
Podcasting takes ears away from AM and FM radio. When it is combined with all types of internet radio, here are the comparitive results:
2010-INTERNET BEATS BROADCAST RADIO!
According to:
http://www.bridgeratings.com/press_071906-digitalprojectionsupdwradio.htm
All forms of Internet Radio's total cume, incuding cell streaming from the internet, and podcasting by 2010 will equal:
Internet Radio 187.33 million
Wireless Internet 159.23 million
Mobile Phone Streaming (from internet) 11.81 million
Podcasting 3.95 million
TOTAL INTERNET CUME in 2010 = 362.32 million
While the terrestrial broadcast radio total cume is projected to be only: 278.59 million.
Internet cume beating terrestrial cume by 83.73 million by 2010.
That is only about 3 years from now!
HD Radio will only be at a miserable 8.84 million cume. Not enough to sustain thousands of HD stations.