RAJAR collects information on behalf of over 300 BBC and Ofcom-licensed commercial radio stations, ranging from very small local services to the national networks.
Station listening by time, duration, platform (AM/FM, DAB, online/app, and DTV) and location (in car, at home, at work, or elsewhere) is recorded and published on a quarterly basis.
[2] The diary is filled in on a quarter-hour basis for one week's listening drawn from a sample representative of the individual station transmission area and the nation as a whole.
RAJAR continues to work with developers to determine future viability of innovations with audiometers and any new measurement techniques that could be of use.
It is recognised that respondent engagement is critical to the continued quality of the survey and that by offering a choice as to how people record and return their listening data will help maintain the current high levels of participation and completion into the future.