C. E. Hooper pioneered the idea of calling various numbers in a city and asking what was being listened to “now,” which was followed by Arbitron and the diary system where people wrote down in a book ...

For nearly forty years, the seven-day radio diary has been the predominant tool for measuring radio listening in the United States. The Arbitron radio diary has withstood all challenges from ...

C. E. Hooper pioneered the idea of calling various numbers in a city and asking what was being listened to “now,” which was followed by Arbitron and the diary system where people wrote down in ...