FOR anyone who has wondered why some shops keep playing one particular music radio station in the background, we may have the convoluted answer. The radio industry is experimenting with new ways of measuring how many people listen to which radio stations and for how long. It wants to get away from the old system of giving diaries to a test sample of people to record their listening habits.
One clever new idea is to get testers to wear a watch-sized device which records snatches of sound every minute. Once a week the device is hooked up to a central…
