As industry consolidation has molded many AM/FM stations into a cookie cutter format, a growing number of listeners have switched to two new alternatives: Online stations and satellite stations.

About 19 million people listen to online radio at least once a week, up from 7 million in 2000. 13% of Americans, ages 12 to 24, now listen to online radio on a weekly basis, up from 6% of that age group in 2001. The number of online listeners is growing at an average 43% a year as more people get broadband connections at home and tune in for content that's unavailable or in short supply on commercial stations.

Satellite radios, like XM and Sirius, which use a pay-radio model, charging between $10 and $13 a month, and targeting car-radio users have an estimated 2 million subscribers. The number is expected to rise to 16 million within five years.

Although 14% less people listen to regular radio than ten years ago, the AM/FM industry doesn't seem too concerned. 228 million Americans ages 12 and up still listen to broadcast radio weekly, and radio remains the top broadcast medium after TV for advertisers who want to reach a mass market.