Patent ID: 7630888

Claim:
Method for evaluating hearing samples of ambient noise recorded by at least one first device in at least one first location where programs to be monitored are received, the hearing samples being obtained by a method comprising recording samples of an ambient noise using a sound transducer, the sample duration being shorter than the sampling cycle, the method for evaluating hearing samples comprising recording, by at least one second device in at least one second location where the programs to be monitored are broadcast, a plurality of samples of the programs to be monitored wherein each of the samples of programs to be monitored has a greater duration than a corresponding one of the recorded hearing samples, and calculating a first correlation for comparing the hearing samples with the program samples in order to find a match, a match occurring if a program sample is considered to be contained in a hearing sample, each of the hearing samples being taken during a respective first period of time completely included in a respective second period of time during which a corresponding one of the program samples is taken.