Average Quarter Hour (AQH) Persons: The average number of persons listening to a particular station for at least five minutes during a 15-minute period.
Gross Impressions (GIMPS): The sum of the AQH persons audience for all spots in a given schedule.
Cost Per Thousand (CPM): The cost of delivering 1,000 Gross impressions (GI’s)
Cost of Schedule/gross impression x1000=CPM
Cume Persons: The estimated number of different persons who listened to a station for a minimum of five minutes in a quarter-hour within a reported daypart. (Cume estimates may also be referred to as cumulative or unduplicated estimates).
Cume Rating: The cume persons audience expressed as a percentage of all persons estimates to be in the specified demographic group.
Frequency: The average number of times a person is exposed to a radio spot schedule.
Gross Impressions/net reach=Frequency
