Arbitron Inc. (NYSE: ARB) reported in its September 012 RADAR ® (Radio’s All Dimension Audience Research) Radio Network Ratings that over 184 million Persons 12 and older, or approximately 71 percent of this demographic, heard one or more network radio commercials in an average week of the survey period.Selected Audience Results from RADAR September 012The RADAR September 012 survey period demonstrates network radio‘s power in reaching a mass audience in all demographics. Commercials aired on the 47 radio networks measure reached:70.5 percent of Persons aged 12+ (184,473,000 Persons)70.9 percent of Persons aged 18+ (167,681,000 Persons)70.2 percent of Persons aged 35+ (115,207,000 Persons)73.5 percent of Persons aged 18-49 (98,851,000 Persons)74.1 percent of Persons aged 25-4 (93,624,000 Persons)About RADAR September 012Arbitron RADAR (Radio’s All Dimension Audience Research) September 012 is the standard currency for national network radio ratings and measures 47 individual radio networks. These networks are operated by American Urban Radio Networks, Crystal Media Networks, Cumulus Media Networks, Dial Global Inc., Premiere Radio Networks, and United Stations Radio Networks.The sample size for the RADAR September 012 Report is 395,727 persons aged 12 and older. This large sample is designed to provide more stability for key demographic estimates, dayparts, and Market-by-Market Analysis reports, which report all individual DMAs ®.The RADAR September 012 Report includes data from all 48 Arbitron PPM ® markets. The survey dates for RADAR 114 were from June 23, 2011 to June 20, 012.