Arbitron Inc. Signs Strategic R&D Agreement With Johns Hopkins Applied Physics Laboratory.

Business/Medical Editors

COLUMBIA, MD.--(BUSINESS WIRE)--Sept. 10, 2001

Arbitron Inc. (NYSE:ARB) has signed a multi-year Research Technology Development and Licensing Agreement with The Johns Hopkins University Applied Physics Laboratory (APL), in Laurel, Md.

Under this agreement, APL will provide research and development expertise to enhance Arbitron's audience measurement capabilities and services, including its Portable People Meter audience measurement system. The Portable People Meter, currently undergoing U.S. market trials, is the first electronic measurement device to automatically collect information about a person's exposure to radio, TV and cable programming. The pager-sized device, carried by consumers, records station identification codes, inaudible to listeners that broadcasters embed in the audio portion of their programming. Once a day, survey participants place their meter into a base station that recharges the device and sends the collected codes to Arbitron for tabulation.

APL is applying its expertise in acoustics, radio frequency technologies, as well as electronics packaging, fabrication processes and reliability testing gained from its Department of Defense- and NASA-related projects to extend the capabilities of the Portable People Meter, which is currently undergoing U.S. market trials. "This alliance with Arbitron is a great example of how APL is transferring technology to benefit an international company while enhancing our local community," says APL Director Richard Roca.

"Our agreement with APL will advance Arbitron's goal of establishing the Portable People Meter as a global standard for media measurement," says Ron Kolessar, vice president, Technology, Arbitron Inc. "Their expertise will help us augment our Portable People Meter so that the system will better serve our customers' needs in the U.S. and around the world."

About The Johns Hopkins Applied Physics Laboratory

The Applied Physics Laboratory, a division of The Johns Hopkins University, meets critical national challenges through the innovative application of science and technology. For more information, visit www.jhuapl.edu.

About Arbitron

Arbitron Inc. (NYSE: ARB) is an international media and marketing research firm serving radio broadcasters, cable companies, advertisers and advertising agencies in the United States and Europe. Arbitron's core businesses are measuring network and local market radio audiences across the United States; surveying the retail, media and product patterns of local market consumers; and providing application software used for analyzing media audience and marketing information data. Arbitron Webcast Services measures the audiences of audio and video content on the Internet, commonly known as webcasts. The Company is developing the Portable People Meter, a new technology for radio, TV and cable ratings.

Arbitron's marketing and business units are supported by a world-renowned research and technology organization located in Columbia, Maryland. Arbitron has approximately 750 full-time employees; its executive offices are located in New York City.

Through its Scarborough Research joint venture with VNU Media Measurement & Information, Arbitron also provides media and marketing research services to the broadcast television, magazine, newspaper, outdoor and online industries.

This press release is available on the Arbitron Web site at www.arbitron.com and the KCSA Web site at www.kcsa.com. You may register to receive Arbitron's future press releases or to download a complete Digital Investor Kit(TM) including press releases, regulatory filings and corporate materials by clicking on the "Digital Investor Kit" icon at www.kcsa.com.

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The statements regarding Arbitron in this release that are not historical in nature, particularly those that utilize terminology such as "may," "will," "should," "likely," "expects," "anticipates," "estimates," "believes" or "plans," or comparable terminology, are forward-looking statements based on current expectations about future events, which Arbitron has derived from the information currently available to it. These forward-looking statements involve known and unknown risks and uncertainties that may cause our results to be materially different from results implied in such forward-looking statements. These risks and uncertainties include whether we will be able to:

- realize the benefits we expect to achieve from our spin-off from Ceridian
Corporation;

- renew contracts with large customers as they expire;

- successfully execute our business strategies, including timely implementation
of our Portable People Meter and our Webcast Ratings services, as well as
expansion of international operations;

- benefit from further consolidation in the radio industry; and

- keep up with rapidly changing technological needs of our customer base,
including creating new products and services that meet these needs.

Additional important factors known to Arbitron that could cause forward-looking statements to turn out to be incorrect are identified and discussed from time to time in Arbitron's filings with the Securities and Exchange Commission, including in particular the risk factors discussed under the caption "ITEM 1. BUSINESS - Business Risks" in our Annual Report on Form 10-K, which discussion is incorporated herein by reference. The forward-looking statements contained in this release speak only as of the date hereof, and Arbitron undertakes no obligation to correct or update any forward-looking statements, whether as a result of new information, future events or otherwise.