Arbitron Webcast Ratings Clocked More Than 17 Million Hours of Streaming Media Listening in Month of January; StreamAudio Joins January Arbitron Webcast Ratings

Business Wire, April 10, 2001

Business & High Tech Editors

NEW YORK--(BUSINESS WIRE)--April 10, 2001

Arbitron Inc. (NYSE: ARB) today announced that it measured more than 17 million hours of streaming media in the month of January according to the latest Arbitron Webcast Ratings(SM).

StreamAudio (www.streamaudio.com) joined the January Arbitron Webcast Ratings service with three channels ranked in the top 75, including WEEI-AM, ranked at number 43; WAAF-FM, ranked at number 54; and KMTT-FM, ranked at number 56.

"The Arbitron Webcast Ratings results for StreamAudio shows how effective streaming can be for broadcast radio stations and Internet audio," said Bob Case, CEO, StreamAudio. "StreamAudio enables radio stations to get online quickly and cost-effectively with unlimited streams, ad-insertions and 'now playing' features. Listeners are turning to the Internet for a high quality listening experience in the workplace and at home with far greater frequency."

For the second straight month, Beethoven.com (www.beethoven.com), streamed by iBEAM Broadcasting Corp., ranked number one with 727,400 aggregate tuning hours (ATH) - the sum total of all hours that listeners tune to a given channel. Continuing its popularity, WABC-AM (www.wabcradio.com), a New York-based news, talk and information radio station streamed by RealBroadcast Networks, ranked second with 310,700 ATH. Following closely in the third spot is MEDIAmazing (www.mediamazing.com) with 251,600 ATH.

"Our rankings continue to show that people want to listen to original or traditional content online when they don't have access to it on the radio," said Joan FitzGerald, director of marketing and research and development, Arbitron Webcast Services.

New to the top ten were KPLU-FM (www.kplu.org) with 203,400 ATH and CFNY-FM (www.edge102.com) with 184,100 ATH. Activate Corp. streamed both channels.

Arbitron Webcast Ratings currently measures 2,300 stations and channels that provide Arbitron with access to their server data. These channels represent more than 17 million total hours of tuning in January 2001. The rankings included in the January 2001 Arbitron Webcast Ratings are based on those stations and channels that have provided Arbitron with access to their server data by March 15, 2001. The ratings may not reflect all tuning for the measured stations or channels, since Arbitron may have received data after the cut-off date, received incomplete server data or some data that was not unusable.

Background and Methodology

Arbitron Webcast Ratings debuted with October 1999 data as the world's first streaming media ratings service. Arbitron Webcast Ratings provides ratings for streamed media because webcasters need objective, third- party audience measurement to demonstrate the value of their audiences to agencies and advertisers. Arbitron Webcast Ratings is a server-side measurement, which captures all tuning to participating streamed media channels by compiling a near census of Internet tuning sessions.

This ratings report compiled Aggregate Tuning Hours during the month of January for listeners to over 2,300 Internet audio channels being streamed by or affiliated with ABC Radio, ABC Radio Networks, AccelerNet, Activate Corp., Akamai Technologies, Inc., Beethoven.com, Beta Lounge, BroadcastAMERICA, The BroadcastWeb Network, Inc., Cablemusic Networks, Inc., Classic Radio, Inc., Control Room Technologies, Corus Entertainment, CyberAxis, DiscJockey.com, Dublab, Enigma Digital, Entravision, eYada.com, Fordham University, GAYBC Radio Network, Ginger Online, GlobalMedia, GUS Networks, House of Blues Digital, Inc., iBEAM Broadcasting Corp., Live365.com, MEDIAmazing, NetRadio.com, Northwestern University, NRJ Energy Radio Sweden , Pacific Lutheran University, Public Interactive, RadioValve, RealBroadcast Networks, Rivals.com, Salem Communications, The Sporting News Online, StreamAudio, SyncCast, TigerRadio.com, the University of Pennsylvania, the University of Tennessee, and WCPE-FM.

About Arbitron

Arbitron Inc. (www.arbitron.com) is an international media and marketing research firm serving radio and other broadcasters, cable companies, advertisers and advertising agencies in the United States and Europe.

Arbitron's core businesses are measuring radio audiences in local markets across the United States; surveying the retail, media and product patterns of local market consumers; and providing application software used for accessing and analyzing media audience and marketing information data.

Arbitron also provides media and marketing research services to the cable, broadcast television, magazine, newspaper and online industries. Arbitron Webcast Services measures the audiences of audio and video content on the Internet, commonly known as webcasts.

Arbitron's marketing and business units are supported by a world-renowned research and technology organization located in Columbia, Maryland. Arbitron employs approximately 700 full-time employees; its executive offices are located in New York City.

(Webcast Ratings list to follow)