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Arbitron Internet Broadcast Services Releases the Last Ratings Using the MeasureCast System

NEW YORK, April 13, 2004 Arbitron Internet Broadcast Ratings released today, the ratings for the week of March 22, the last ratings using the MeasureCast system.

Business Brokerage In February, the company announced its plans to revamp the offerings of its Internet Broadcast Services division. The division has ceased producing weekly and monthly ratings but continues to be active in the market, having just released the latest in its series of Internet Broadcast and Multimedia studies, Internet and Multimedia 12: The Value of Internet Broadcast Advertising.

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Forex Broker Arbitron remains committed to helping the Internet broadcast industry grow and we are confident in the viability of the medium, said Bill Rose, vice president/general manager, Arbitron Internet Broadcast Services. We will continue to document the size and growth of the Internet broadcasting audience through our Internet studies we will work with the industry leaders to explore the next generation of measurement.

Cable television services are delivered to consumers via networks of fibre optic cables. The signals are decoded using a set top box, which is provided by the service supplier as part of a subscription package. Digital cable customers can also access telephone services and broadband internet services. Digital cable can carry around 200 services (TV and radio), plus interactive services. All Public Service Broadcasting channels (including Five) are available with any cable TV subscription package.

Online Brokerage In the final set of ratings, AOL Radio@Network and LAUNCH were the top-ranked commercial Internet Broadcasters with 4,728,485 and 4,181,374 hours of TTSL, respectively. AOL reported problems with their server data for the week, resulting in ratings that are lower than prior weeks. MUSICMATCH was the top-ranked non-commercial Internet Broadcaster, with 2,463,776 hours of TTSL. The Adsertion Network was ranked as the top Internet Radio Advertising Sales Network with 865,614 TTSL.

Tiscali is an internet based digital TV service on trial in London, which allows you to watch popular shows up to seven days after theya ve first been broadcast. As ita s an internet service, you can also get deals on your home phone and broadband, too.

Real Estate Broker MUSICMATCH Artist Match was ranked as the number one Internet radio station and top non-commercial station with 1,031,601 hours of TTSL. Virgin Radio was the top commercial Internet Broadcast Station 357,199 with hours of TTSL.

Such events could include a loss of power at your location, speed Internet service, and fluctuations in the quality of service of the public internet.

Agency Brokerage Spark The top Content Delivery Networks (CDN) were Live365 and StreamGuys with 2,991,110 TTSL and 616,522 TTSL, respectively. The Total Time Spent Listening for these Content Delivery Networks is the sum of all tuning to stations streamed by the CDN including commercial and non-commercial stations.

The internet service provider Wanadoo says that more than 150, 000 customers are now using its voice over internet protocol (VoIP) phone service.

Business Broker Internet Broadcasters and Sales Networks Weekly Top 15 (March 22 March 28)

Rank	Company	Type	TTSL	CUME
1	AOL Radio@Network	commercial	4,728,485	932,155
2	LAUNCH	commercial	4,181,374	1,046,150
3	MUSICMATCH	non-commercial	2,463,776	575,370
4	The Adsertion Network	sales network	865,614	91,130
5	Virgin Radio	commercial	615,636	87,508
6	KEXP	non-commercial	214,220	26,692
7	KillerOldies.com	commercial	174,957	23,825
8	AccuRadio	commercial	120,650	52,163
9	Mak Radio	commercial	116,597	31,703
10	KPLU	non-commercial	105,147	15,603
11	WXPN-FM	non-commercial	99,823	13,116
12	WOXY-FM	commercial	87,598	14,228
13	WBUR	non-commercial	83,042	24,375
14	WKSU-FM	non-commercial	78,751	21,258
15	WFUV-FM	non-commercial	33,038	6,786

Brokerage Account Arbitron Internet Broadcast Stations Weekly Top 50 (March 22 March 28)

Rank	Station/Type/Format	Owner/Network/URL	TTSL	Cume
1	MUSICMATCH Artist Match (non-commercial) Miscellaneous	MUSICMATCH www.musicmatch.com	1,031,601	328,376
2	Virgin Radio UK (Digital) (commercial) Adult Contemporary	Virgin Radio www.virginradio.co.uk	357,199	63,237
3	MUSICMATCH Top Hits (non-commercial) Contemporary Hit Radio / Top 40	MUSICMATCH www.musicmatch.com	222,617	95,072
4	KEXP (non-commercial) Eclectic Music	KEXP Radio www.kexp.org	214,220	26,692
5	AOL Lite Rock (commercial) Soft Rock	AOL Radio@Network music.netscape.com/radio/	206,976	35,458
6	AOL Top Country (commercial) Country	AOL Radio@Network music.netscape.com/radio/	202,149	62,274
7	MUSICMATCH Artist On Demand (non-commercial) Miscellaneous	MUSICMATCH www.musicmatch.com	198,925	53,332
8	AOL Smooth Jazz (commercial) Smooth Jazz	AOL Radio@Network music.netscape.com/radio/	196,596	38,553
9	AOL Top Pop (commercial) Pop	AOL Radio@Network music.netscape.com/radio/	192,172	78,811
10	Killer Oldies (commercial) Adult Alternative	KillerOldies.com www.killeroldies.com	174,957	23,825
11	Virgin Radio Classic Tracks (commercial) Classic Rock	Virgin Radio www.virginradio.co.uk	166,723	27,487
12	AOL Awesome 80s (commercial) 80s	AOL Radio@Network music.netscape.com/radio/	165,312	50,668
13	AOL Love Songs (commercial) Love Songs	AOL Radio@Network music.netscape.com/radio/	163,438	41,917
14	AOL Classic Rock (commercial) Classic Rock	AOL Radio@Network music.netscape.com/radio/	149,294	40,255
15	AOL Pop Rock (commercial) Rock	AOL Radio@Network music.netscape.com/radio/	134,151	37,506
16	MUSICMATCH Genre Match (non-commercial) Miscellaneous	MUSICMATCH www.musicmatch.com	122,309	48,254
17	AOL Oldies (commercial) Oldies	AOL Radio@Network music.netscape.com/radio/	118,719	36,456
18	Mak Radio (commercial) Miscellaneous	Live365.com www.makradio.com	109,565	30,689
19	AOL Super 70s (commercial) 70s	AOL Radio@Network music.netscape.com/radio/	108,970	29,438
20	AOL R&B Fresh (commercial) R&B	AOL Radio@Network music.netscape.com/radio/	108,678	38,139
21	MUSICMATCH Soft Hits (non-commercial) Soft Rock	MUSICMATCH www.musicmatch.com	108,478	23,418
22	AOL Top Alternative (commercial) Alternative	AOL Radio@Network music.netscape.com/radio/	108,386	50,397
23	KPLU (non-commercial) Miscellaneous	KPLU www.kplu.org	105,147	15,603
24	MUSICMATCH Country Hits (non-commercial) Country	MUSICMATCH www.musicmatch.com	103,890	26,258
25	WXPN-FM (non-commercial) Adult Alternative	WXPN-FM www.xpn.org	99,823	13,116
26	AOL New Age (commercial) New Age	AOL Radio@Network music.netscape.com/radio/	96,332	22,190
27	AOL R&B SlowJams (commercial) R&B	AOL Radio@Network music.netscape.com/radio/	95,589	28,583
28	AOL Christian (commercial) Miscellaneous	AOL Radio@Network music.netscape.com/radio/	93,308	31,704
29	AOL Top Jams (commercial) Miscellaneous	AOL Radio@Network music.netscape.com/radio/	92,667	55,964
30	WOXY-FM (commercial) Modern Rock	WOXY-FM www.woxy.com	87,598	14,228
31	WBUR (non-commercial) Miscellaneous	WBUR www.wbur.org	81,366	23,961
32	WKSU (non-commercial) NPR/Classical/Folk	WKSU wksu.org & folkalley.com	78,751	21,258
33	AOL 90s Country (commercial) 90s	AOL Radio@Network music.netscape.com/radio/	76,450	25,440
34	AOL Modern Gospel (commercial) Gospel	AOL Radio@Network music.netscape.com/radio/	74,683	13,883
35	AOL Pop Mix (commercial) Pop	AOL Radio@Network music.netscape.com/radio/	70,366	23,831
36	The Virgin Radio Groove (commercial) Urban	Virgin Radio www.virginradio.co.uk	68,598	12,737
37	MUSICMATCH Classic Rock (non-commercial) Rock	MUSICMATCH www.musicmatch.com	68,552	18,034
38	MUSICMATCH 80's Hits (non-commercial) Miscellaneous	MUSICMATCH www.musicmatch.com	67,757	21,200
39	AOL 90s Pop (commercial) Pop	AOL Radio@Network music.netscape.com/radio/	60,953	26,310
40	MUSICMATCH Smooth Jazz (non-commercial) Jazz	MUSICMATCH www.musicmatch.com	59,481	14,093
41	AOL 90s Alternative (commercial) Alternative	AOL Radio@Network music.netscape.com/radio/	58,778	25,476
42	AOL Acoustic Rock (commercial) Rock	AOL Radio@Network music.netscape.com/radio/	57,038	18,705
43	AOL Classical 101 (commercial) Classical	AOL Radio@Network music.netscape.com/radio/	54,191	16,738
44	AOL Romantic Jazz (commercial) Jazz	AOL Radio@Network music.netscape.com/radio/	52,301	14,753
45	AOL Easy Listening (commercial) Miscellaneous	AOL Radio@Network music.netscape.com/radio/	49,239	16,157
46	AOL Alternative Mix (commercial) Miscellaneous	AOL Radio@Network music.netscape.com/radio/	48,084	20,882
47	MUSICMATCH Rap & Hip Hop (non-commercial) Hip Hop	MUSICMATCH www.musicmatch.com	44,912	30,189
48	AOL Adult Rock (commercial) Rock	AOL Radio@Network music.netscape.com/radio/	44,309	14,862
49	AOL MotownSound (commercial) Miscellaneous	AOL Radio@Network music.netscape.com/radio/	43,404	14,795
50	MUSICMATCH Alternative Rock (non-commercial) Alternative	MUSICMATCH www.musicmatch.com	43,288	15,070

Stock Broker Notes:

1. TTSL (Total Time Spent Listening), sometimes referred to as Aggregate Tuning Hours (ATH), is the total number of hours tuned to a given station or network in the reported time period.
2. Cume Persons is an estimate of the total number of unique listeners who had one or more listening sessions lasting five minutes or longer during the reported time period. This estimate is derived using an algorithm that takes into account unique media player GUIDs, unique IP addresses and other variables during the reported time period.
3. The ratings may not reflect all tuning for the measured stations or channels since Arbitron may have received incomplete or unusable server data.
4. As Arbitron Internet Broadcast Ratings (powered by MeasureCast technology) transitions to a subscription-only service, some stations previously reported in the ratings have elected not to subscribe to the service and will no longer be included.
5. The 128K MP3 and all Ogg streams for Virgin Radio/1215 AM & 105.8 FM are not currently measured by Arbitron Internet Broadcast Ratings.
6. Due to a switch in Content Delivery Networks, tuning for The Adsertion Network is lower for the week.
7. AOL reported problems with their server data for the week, resulting in ratings that are lower than prior weeks.

Brokerage Online Stock Trading About Arbitron
Arbitron Inc. (NYSE: ARB) is an international media and marketing research firm serving radio broadcasters, cable companies, advertisers, advertising agencies and outdoor advertising companies in the United States, Mexico and Europe. Arbitrons 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 Internet Broadcast 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, television and cable ratings.

Broker Justin Ticket Arbitrons marketing and business units are supported by a world-renowned research and technology organization located in Columbia, Maryland. Arbitron has approximately 825 full-time employees; its executive offices are located in New York City.

Real Estate Brokerage Through its Scarborough Research joint venture with VNU, Inc., Arbitron also provides media and marketing research services to the broadcast television, magazine, newspaper, outdoor and online industries.

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