Arbitron Details May 2009 Sample Quality Metrics for PPM Markets

In-Tab Sample Performance by Demographic

Designated Delivery Index (DDI)

May 2009 PPM survey month (April 30, 2009-May 27, 2009)

Rank	Market	Persons 6+	Persons 18-54
	15-market average	103	97
1	New York (non-embedded)	103	95
2	Los Angeles	105	100
3	Chicago	99	87
4	San Francisco (non-embedded)	98	88
5	Dallas-Ft. Worth	109	99
6	Houston	117	114
7	Atlanta	105	95
8	Philadelphia	97	100
9	Washington, DC	102	101
10	Boston	100	97
11	Detroit	110	101
19	Nassau-Suffolk	92	91
26	Riverside-San Bernardino	108	100
35	San Jose	100	95
38	Middlesex-Somerset-Union	95	89

Designated Delivery Index or DDI is the actual sample size for a given demographic divided by the target sample size for the demographic (times 100). A DDI of 100 means that Arbitron achieved its sample target; a DDI of greater than 100 means that Arbitron exceeded its sample target.

Persons 6+ Sample Performance by race/ethnicity

Designated Delivery Index (DDI)

May 2009 PPM survey month (April 30, 2009-May 27, 2009)

Rank	Market	Black 6+	Hispanic 6+
	15-market average	102	113
1	New York (non-embedded)	103	117
2	Los Angeles	99	122
3	Chicago	100	107
4	San Francisco (non-embedded)	100	123
5	Dallas-Ft. Worth	96	111
6	Houston	120	117
7	Atlanta	106	–
8	Philadelphia	100	–
9	Washington, DC	94	104
10	Boston	–	–
11	Detroit	102	–
19	Nassau-Suffolk	–	–
26	Riverside-San Bernardino	–	111
35	San Jose	–	145
38	Middlesex-Somerset-Union	105	100

– Population in indicated market too small to meet reporting standards.

Persons 18-34 Sample Performance by race/ethnicity

Designated Delivery Index (DDI)

May 2009 PPM survey month (April 30, 2009-May 27, 2009)

Rank	Market	Persons 18-34	Black 18-34	Hispanic 18-34
	15-market average	89	84	101
1	New York (non-embedded)	89	78	106
2	Los Angeles	89	75	102
3	Chicago	77	73	91
4	San Francisco (non-embedded)	91	95	137
5	Dallas-Ft. Worth	91	66	101
6	Houston *	110	121	114
7	Atlanta	88	86	–
8	Philadelphia *	92	85	–
9	Washington , DC	85	82	94
10	Boston	93	–	–
11	Detroit	85	59	–
19	Nassau-Suffolk	84	–	69
26	Riverside-San Bernardino	82	–	80
35	San Jose	87	–	124
38	Middlesex-Somerset-Union	87	99	91

– Population in indicated market too small to meet reporting standards.

* “Year Two+” market; DDI benchmarks/guarantees based on a 13 survey-month rolling average

Hispanic Persons 6+ Sample Performance by language preference

Designated Delivery Index (DDI)

May 2009 PPM survey month (April 30, 2009-May 27, 2009)

Rank	Market	Spanish Dominant	English Dominant
	8-market average	132	106
1	New York (non-embedded)	113	122
2	Los Angeles	150	92
3	Chicago	116	95
4	San Francisco (non-embedded)	160	87
5	Dallas-Ft. Worth	121	95
6	Houston	117	118
7	Atlanta	–	–
8	Philadelphia	–	–
9	Washington, DC	–	–
10	Boston	–	–
11	Detroit	–	–
19	Nassau-Suffolk	–	–
26	Riverside-San Bernardino	114	109
35	San Jose	168	126
38	Middlesex-Somerset-Union	–	–

– Only eight of the 14 PPM markets qualify for Spanish-language weighting

“Year Two+” PPM Market Performance

Designated Delivery Index (DDI)

13 PPM survey-month rolling average: June 2008–May 2009

Demographic	“Year Two+”		June 08-May 09 Average
Demographic	Guarantee	Benchmark	Philadelphia	Houston*
Persons 6+	–	100	105	103
Persons 18-54	90	–	106	103
Persons 18-34	–	80	98	96
Black Persons 18-34	–	80	102	101
Hispanic Persons 18-34	–	80	**	102
Other 18-34		80	96	84

* Houston average does not include September and October survey months, which were not reported due to Hurricane Ike;

** Philadelphia Hispanic population not a large enough percentage of the market population for an 18-34 benchmark

Average Daily In-Tab Rates

14 PPM Currency Markets

May 2009 PPM survey month (April 30, 2009-May 27, 2009)

	Persons 6+	Persons 6+	Persons 18-34	Black 18-34	Hispanic 18-34	Other 18-34
`	May	Avg. to date	Avg. to date	Avg. to date	Avg. to date	Avg. to date
Benchmark		75%	70%	70%	70%	70%
Average	75%	77%	71%	66%	72%	71%
New York Core	76%	79%	71%	68%	72%	71%
Los Angeles	76%	80%	75%	68%	76%	73%
Chicago	76%	80%	73%	64%	78%	73%
San Fran Core	75%	78%	72%	68%	73%	72%
Dallas	74%	76%	72%	67%	76%	70%
Houston	74%	73%	66%	62%	68%	66%
Atlanta	73%	75%	69%	67%	78%	69%
Philadelphia	72%	75%	68%	64%	71%	68%
Washington , DC	74%	74%	66%	62%	67%	69%
Boston	73%	75%	69%	67%	68%	69%
Detroit	76%	79%	71%	61%	n/a	74%
Middlesex-Somerset-Union	76%	81%	73%	72%	67%	76%
Riverside- San Bernardino	77%	80%	74%	75%	74%	73%
San Jose	76%	78%	72%	n/a	72%	73%
Nassau-Suffolk	76%	79%	69%	66%	70%	69%

– Population in indicated market too small to meet reporting standards.

Sample Performance Indicator (SPI)

Average Daily Persons 6+

May 2009 PPM survey month (April 30, 2009-May 27, 2009)

Rank	Market	May 2009
	15-market average	19.4%
1	NY (Total Metro)	16.3%
2	Los Angeles	20.0%
3	Chicago	20.4%
4	SF (Total Metro)	17.4%
5	Dallas	22.6%
6	Houston	20.1%
7	Atlanta	20.2%
8	Philadelphia	18.8%
9	Washington, DC	20.7%
10	Boston	17.9%
11	Detroit	23.7%
19	Nassau-Suffolk	15.7%
26	Riverside-San Bernardino	23.5%
35	San Jose	16.4%
38	Middlesex-Somerset-Union	17.2%

About SPI

(Sample Performance Indicator) SPI is a longitudinal measure that is used as a proxy for response metrics in electronic media panels for radio and television. For PPM, the average daily persons SPI each month is a key performance metric that shows what percent of total persons in the original, pre-designated random sample of persons selected for a PPM panel were in the panel and actually cooperated by wearing their meter for at least eight hours on a given day. Each of the 28 days in a PPM survey has an SPI metric, which is averaged for the reporting period.

About Designated Delivery Index

Designated Delivery Index or DDI is the actual sample size for a given demographic divided by the target sample size for the demographic (multiplied by 100). A DDI of 100 means that Arbitron achieved its sample target; a DDI of greater than 100 means that Arbitron exceeded its sample goal.

Arbitron “weights” its sample by age, sex, geography, race, ethnicity and language preference so that a demographic segment contributes to the tabulation of the audience estimates in the same proportion as the composition of the market. Demographics that are below a DDI of 100 are “weighted up” to the sample target and vice versa.

About the Portable People Meter

The Arbitron Portable People Meter^TMsystem uses a passive audience measurement device – about the size of a small cell phone – to track consumer exposure to media and entertainment, including broadcast, cable and satellite television; terrestrial, satellite and online radio as well as cinema advertising and many types of place-based electronic media. Carried throughout the day by randomly selected survey participants, the PPM^TM device can track when and where they watch television, listen to radio as well as how they interact with other forms of media and entertainment.

The PPM detects inaudible codes embedded in the audio portion of media and entertainment content delivered by broadcasters, content providers and distributors. At the end of the day, the meter is placed in a docking station that extracts the codes and sends them to a central computer. The PPM is equipped with a motion sensor, a patented quality control feature unique to the system, which allows Arbitron to confirm the compliance of the PPM survey participants every day.

About Arbitron

Arbitron Inc. (NYSE: ARB) is a media and marketing research firm serving the media – radio, television, cable, online radio and out-of-home – as well as advertisers and advertising agencies. 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. The company has developed the Portable People Meter, a new technology for media and marketing research.

Arbitron’s headquarters and its world-renowned research and technology organizations are located in Columbia, Maryland.

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Portable People Meter^TM and PPM^TM are marks of Arbitron Inc.

PPM ratings are based on audience estimates and are the opinion of Arbitron and should not be relied on for precise accuracy or precise representativeness of a demographic or radio market.

Arbitron Forward-Looking Statements

Statements in this release that are not strictly historical, including the statements regarding expectations for 2009 and any other statements regarding events or developments that we believe or anticipate will or may occur in the future, may be "forward-looking" statements. There are a number of important factors that could cause actual events to differ materially from those suggested or indicated by such forward-looking statements. These factors include, among other things, the current global economic recession and the upheaval in the credit markets and financial services industry, competition, our ability to develop and successfully market new products and technologies, our ability to successfully commercialize our Portable People Meter^TM service, the growth rates and cyclicality of markets we serve, our ability to expand our business in new markets, our ability to successfully identify, consummate and integrate appropriate acquisitions, the impact of increased costs of data collection including a trend toward increasing incidence of cell phone-only households, litigation and other contingent liabilities including intellectual property matters, our compliance with applicable laws and regulations and changes in applicable laws and regulations, our ability to achieve projected efficiencies, cost reductions, sales growth and earnings, and international economic, political, legal and business factors. Additional information regarding the factors that may cause actual results to differ materially from these forward-looking statements is available in our SEC filings, including our 2008 Annual Report on Form 10-K. These forward-looking statements speak only as of the date of this release and the Company does not assume any obligation to update any forward-looking statement.

[1] The May 2009 survey includes the Memorial Day Holiday Weekend.