System for measuring audience of media on at least one internet communication network

A system for measuring audience on a collection of networks comprising:

• at least one communications network, on which a plurality of media are broadcast or made available and in which a plurality of predetermined users is associated with a first suite of machines connected to a network of the said collection of networks, in a first zone of use and with at least one second suite of machines connected to a network of the said collection of networks, in a second zone of use;
• a calculation means (M1-M5) to produce, on the basis of the first suite of machines (DT), user counterparts for at least one other zone of use (AL) so as to reconstitute the plurality of the users and of the zones of use;
• a first component (M1) means for producing scaling data (S141 and S142) on the basis of a declarative measurement of use of the medium by zone of use over a time period that is given on the basis of a sample of users of the medium (DTE, ALE, ALNE);
• and
• a second component (M2) means (M21, M22, M23) for producing a list of theoretical frequencies of use of the medium on the other zones of use on the basis of the scaling data produced by the said first component and on the basis of data {NV_s(i), NP_s(i);
• i, s} grouping together the number of visits NV_s(i) and the number of pages viewed NP_s(i) on the site s for each user i of the sample, the base being produced by an audience measurement system centered on the user.