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  		UNITED STATES<BR>
  	SECURITIES AND EXCHANGE COMMISSION
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  	WASHINGTON, D.C. 20549
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  	FORM 8-K
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  	CURRENT REPORT
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  	Pursuant to Section&nbsp;13 or 15(d) of the Securities Exchange Act of 1934
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  	Date of Report (Date of Earliest Event Reported):
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  	&nbsp;
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  	February 1, 2007
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  	Arbitron Inc.
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  <BR>__________________________________________<BR>
  	(Exact name of registrant as specified in its charter)
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  	Delaware
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  	1-1969
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  	52-0278528
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  _____________________<BR>
  	(State or other jurisdiction
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  _____________<BR>
  	(Commission
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  ______________<BR>
  	(I.R.S. Employer
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  	of incorporation)
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  	File Number)
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  	Identification No.)
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  	&nbsp;&nbsp;
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  	142 West 57th Street, New York, New York
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  	10019-3300
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  _________________________________<BR>
  	(Address of principal executive offices)
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  	&nbsp;
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  ___________<BR>
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  	Registrant&#146;s telephone number, including area code:
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  	212-887-1300
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  	Not Applicable
  <BR>______________________________________________<BR>
  	Former name or former address, if changed since last report
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  	&nbsp;
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  <!-- CoverPageRegistrant END --><P><FONT SIZE="2">
  Check the appropriate box below if the Form 8-K filing is intended to
  simultaneously satisfy the filing obligation of the registrant under any
  of the following provisions:</FONT>
  </P>
  <P><FONT SIZE="2">
  [&nbsp;&nbsp;]&nbsp;&nbsp;Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<br>
  [&nbsp;&nbsp;]&nbsp;&nbsp;Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)<br>
  [&nbsp;&nbsp;]&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))<br>
  [&nbsp;&nbsp;]&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))<br>
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  	Item 1.01 Entry into a Material Definitive Agreement.
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  On February 1, 2007 Arbitron Inc. (the "Company") formed a joint venture Delaware limited liability company with Nielsen Media Research, Inc. ("NMR") named Project Apollo LLC (the "LLC").  The LLC was formed to implement commercial deployment in the United States of a product that will measure the media return on investment to advertisers by collecting and integrating product purchase and other information using the Company&#x2019;s Portable People Meter ("PPM") technology.  Initially, each party will own 50% of the equity interests in the LLC and will share equally in funding obligations.  Since April 2005, pursuant to a cost-sharing agreement, the Company and NMR have shared costs and capital expenditures associated with the development and deployment of a pilot panel designed to demonstrate the feasibility of the product.<br><br>ACNielsen (US) Inc., an affiliate of NMR, has entered into an agreement with the LLC to permit the LLC to use its Homescan Panel and certain other data and recruit panelists, tabulate data, and provide related services.  The Company has entered into an agreement with the LLC under which the Company will license PPM data and equipment to the LLC and provide other data collection and transmission services.<br><br>Through its Scarborough Research joint venture with The Nielsen Company, NMR&#x2019;s parent corporation, the Company also provides media and marketing research services to the broadcast television, cable, newspaper, and online industries.<br><br>A copy of a press release announcing the formation of the LLC is attached hereto as Exhibit 99.1, and is incorporated herein by reference.<br>
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  	Item 9.01 Financial Statements and Exhibits.
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  (d)  Exhibits<br><br>See Exhibit Index attached hereto.<br>
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  	SIGNATURES
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  	Pursuant to the requirements of the Securities Exchange Act of 1934, the
  	registrant has duly caused this report to be signed on its behalf by the
  	undersigned hereunto duly authorized.
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  	Arbitron Inc.
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  	&nbsp;&nbsp;
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  <I>
  	February 1, 2007
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  	&nbsp;
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  	By:
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  <I>
  	/s/ Timothy T. Smith
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  	&nbsp;
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  <I>
  	Name: Timothy T. Smith
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  <I>
  	Title: Executive Vice President & Chief Legal Officer, Legal & Business Affairs & Secretary
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  	Exhibit&nbsp;Index
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  	Exhibit No.
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  	Description
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  	99.1
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  Press Release dated February 1, 2007
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metadata_documents: [{"type": "8-K", "sequence": "1", "filename": "htm_17927.htm", "description": "LIVE FILING", "secsgml_size_bytes": 11376}]
metadata_filer: {"company-data": {"conformed-name": "ARBITRON INC", "cik": "0000109758", "assigned-sic": "8700", "irs-number": "520278528", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-01969", "film-number": "07572714"}, "business-address": {"street1": "142 WEST 57TH STREET", "city": "NEW YORK", "state": "NY", "zip": "10019-3300", "phone": "2128871300"}, "mail-address": {"street1": "142 WEST 57TH STREET", "city": "NEW YORK", "state": "N1", "zip": "10019-3300"}, "former-company": [{"former-conformed-name": "CERIDIAN CORP", "date-changed": "19920901"}, {"former-conformed-name": "CONTROL DATA CORP /DE/", "date-changed": "19920703"}, {"former-conformed-name": "COMMERCIAL CREDIT CO", "date-changed": "19680910"}]}
text: Arbitron Inc. (Form: 8-K)
  UNITED STATES
  SECURITIES AND EXCHANGE COMMISSION
  WASHINGTON, D.C. 20549
  FORM 8-K
  CURRENT REPORT
  Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
  Date of Report (Date of Earliest Event Reported):
  February 1, 2007
  Arbitron Inc.
  __________________________________________
  (Exact name of registrant as specified in its charter)
  Delaware
  1-1969
  52-0278528
  _____________________
  (State or other jurisdiction
  _____________
  (Commission
  ______________
  (I.R.S. Employer
  of incorporation)
  File Number)
  Identification No.)
  142 West 57th Street, New York, New York
  10019-3300
  _________________________________
  (Address of principal executive offices)
  ___________
  (Zip Code)
  Registrant's telephone number, including area code:
  212-887-1300
  Not Applicable
  ______________________________________________
  Former name or former address, if changed since last report
  Check the appropriate box below if the Form 8-K filing is intended to
  simultaneously satisfy the filing obligation of the registrant under any
  of the following provisions:
  [  ]  Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
  [  ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
  [  ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
  [  ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
  Top of the Form
  Item 1.01 Entry into a Material Definitive Agreement.
  On February 1, 2007 Arbitron Inc. (the "Company") formed a joint venture Delaware limited liability company with Nielsen Media Research, Inc. ("NMR") named Project Apollo LLC (the "LLC").  The LLC was formed to implement commercial deployment in the United States of a product that will measure the media return on investment to advertisers by collecting and integrating product purchase and other information using the Company's Portable People Meter ("PPM") technology.  Initially, each party will own 50% of the equity interests in the LLC and will share equally in funding obligations.  Since April 2005, pursuant to a cost-sharing agreement, the Company and NMR have shared costs and capital expenditures associated with the development and deployment of a pilot panel designed to demonstrate the feasibility of the product.
  ACNielsen (US) Inc., an affiliate of NMR, has entered into an agreement with the LLC to permit the LLC to use its Homescan Panel and certain other data and recruit panelists, tabulate data, and provide related services.  The Company has entered into an agreement with the LLC under which the Company will license PPM data and equipment to the LLC and provide other data collection and transmission services.
  Through its Scarborough Research joint venture with The Nielsen Company, NMR's parent corporation, the Company also provides media and marketing research services to the broadcast television, cable, newspaper, and online industries.
  A copy of a press release announcing the formation of the LLC is attached hereto as Exhibit 99.1, and is incorporated herein by reference.
  Item 9.01 Financial Statements and Exhibits.
  (d)  Exhibits
  See Exhibit Index attached hereto.
  Top of the Form
  SIGNATURES
  Pursuant to the requirements of the Securities Exchange Act of 1934, the
  	registrant has duly caused this report to be signed on its behalf by the
  	undersigned hereunto duly authorized.
  Arbitron Inc.
  February 1, 2007
  By:
  /s/ Timothy T. Smith
  Name: Timothy T. Smith
  Title: Executive Vice President & Chief Legal Officer, Legal & Business Affairs & Secretary
  Top of the Form
  Exhibit Index
  Exhibit No.
  Description
  99.1
  Press Release dated February 1, 2007