Radio listening via mobile phone also continued growing. In Q1 2008, 11.6 percent of adults ages 15 and older used their mobile phones to listen to radio, up from eight percent in the same period last year, eMarketer reported.

The percentage of 15- to 24-year-olds who listened to mobile radio was up from 20.3 percent in 2007 to 27.3 percent at the end of March 2008.