Persons 12+
Average Weekly Audience
April 2008
Geography: United States (50 States)

Monday-Friday
6AM-7PM		 Monday-Sunday
6AM-Midnight
Cume Persons Average Quarter-Hour Persons Cume Persons Average
Quarter-Hour
Persons

America Online's AOL Radio Network

1,113,485

363,460

1,707,128

223,236

Clear Channel Online Music and Radio

1,024,467

161,665

1,252,265

87,674

Live365

382,159

73,762

527,743

41,504

RL Select

646,199

63,736

912,036

39,952

Yahoo Music/LAUNCHcast

1,003,205

180,170

1,372,496

104,014

Total RL Radio Network

n/a

681,100

n/a

408,700

TOTAL FIVE MEASURED NETWORKS

4,169,516

842,793

5,771,668

496,380

Note: Cume is defined as the number of different people who listen during a given daypart. Cume audience estimates for individual networks should not be added, because people who listen to more than one network will be counted twice. The reported audience for the total of the four networks is an unduplicated estimate of the number of different people who listened to one or more of the networks for a minimum of five minutes during the week.

*The Ronning Lipset Radio (RLR) Network is comprised of Yahoo Music, American Online’s AOL Radio Network, Live365 and RL Select.

The comScore Arbitron Online Radio Ratings service is based on a subset of approximately 200,000 U.S. participants within the comScore global consumer panel. Using proprietary and patent-pending technology, comScore passively and continuously captures the online behavior of these panelists, including online radio listening behavior. Subscribers receive Average Quarter-Hour and Cume audience estimates for 38 demographics and 15 standard broadcast dayparts. Each month, Arbitron publishes the average weekly audience for Persons 12+, Monday-Friday 6AM-7PM and Monday-Sunday 6AM-Midnight on its Web site www.arbitron.com.

Arbitron represents the comScore Arbitron Online Radio Ratings service.  For more information, contact Diane Williams diane.williams@arbitron.com or Bill Rose bill.rose@arbitron.com.