Systems being tested are the Arbitron Portable People Meter, the Eurisko NOP World Media Monitor and the GfK/Telecontrol MediaWatch.
The object of the test is to see how well the meters, which will be worn by around 250 volunteers, can identify 33 different radio stations under as many real-life conditions as possible.
Results will be presented to the Rajar board in December. Rajar research director Paul Kennedy said: "We have created a pioneering test, which we believe will assist Rajar in selecting the very best audiometers for the future job of radio audience measurement.
"Once we have analysed the results from these tests, and assuming we have a successful audiometer or audiometers, then we will be able to progress quickly to regional fieldwork tests and a new specification in 2005."
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