NEW YORK -- RAJAR Confirms Arbitron PPM System as the Electronic Measurement Solution for 2007 Following Extensive Testing Against both Media Audit/IPSOS Smart Phone and MRI/Eurisko Audiometers

Arbitron Inc. (NYSE: ARB) announced today that RAJAR, the industry radio ratings consortium in the United Kingdom, has selected the Arbitron Portable People Meter (PPM(SM)) system for an electronic radio and television audience measurement panel in London, a market of more than six million persons.

The contract for the PPM measurement panel in London was awarded to TNS, a global market information group that is a major supplier of consumer panel, media intelligence and TV and radio audience measurement services around the world. TNS is an international licensee of the Arbitron PPM technology.

TNS has been awarded a two-year contract to operate a PPM Panel that will deliver weekly data for more than 50 national and local radio stations and television channels across four platforms: Analogue, Digital Radio, Digital television and the Internet. This panel will operate in parallel to the current ratings system in the United Kingdom, preparing the way for a full electronic system for radio. Data from the two-year panel is to be analyzed separately and will not be integrated into the main currency.

In a groundbreaking move, RAJAR is combining resources with BARB, the official U.K. television measurement body, in commissioning the panel. As a result, both television viewing and radio listening will be measured by the PPM system.

"The RAJAR evaluation was the most thorough, rigorous and professional evaluation of an electronic measurement system that has ever been conducted anywhere in the world," said Steve Morris, president and chief executive officer, Arbitron Inc. "While we are flattered to be chosen, we worked hard to make the PPM the most advanced and capable audience measurement system anywhere.

"When the Portable People Meter is compared, in a fair and objective manner, to the best that other companies have to offer, our system is the one that broadcasters, agencies and advertisers have selected. To date our portable electronic measurement technology has been accepted over a number of competing systems as a radio, television or multimedia ratings system in seven countries," said Mr. Morris. "No other provider anywhere in the world can say the same."