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Methods and apparatus to monitor media exposure

  • US 8,918,802 B2
  • Filed: 02/28/2011
  • Issued: 12/23/2014
  • Est. Priority Date: 02/28/2011
  • Status: Active Grant
First Claim
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1. A method of monitoring media exposure comprising:

  • receiving a first audio at a first meter;

    deriving a first identifier associated with the first audio;

    receiving an identification code and at least one of a second audio and a second identifier associated with the second audio from a second meter, wherein the identification code is uniquely associated with the second meter; and

    storing the first identifier associated with the first audio and the identification code associated with the second meter if the first identifier and the second identifier substantially match.

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