"Arbitron has clearly made progress in meeting MRC requirements, particularly in most of the larger PPM markets. We look forward to future audits and continued progress." About Arbitron Arbitron Inc. (NYSE: ARB ) is an international media and marketing research firm serving the media–radio, television, cable and out-of-home; the mobile industry as well as advertising agencies and advertisers around the world. Arbitron's businesses include: measuring network and local market radio audiences across the United States ; surveying the retail, media and product patterns of U.S. consumers; providing mobile audience measurement and analytics in the United States, Europe, Asia and Australia, and developing application software used for analyzing media audience and marketing information data. The Company has developed the Portable People Meter (PPM) and the PPM 360™, new technologies for media and marketing research.