The radio ratings system is on hold as the industry looks for new ways to track who is listening to what stations and when.
A survey for the Auckland, Wellington and Christchurch markets had been scheduled to be held in February and March - one of two ratings collections each year.
This year it has been cancelled while the industry looks at new ways to reflect the changing habits of younger listeners. Radio Broadcasters Association chief executive Bill Francis said the year's second nationwide survey with localised ratings would be held on schedule in August and September.
But for now, audience estimates will be based on results from the survey last October.
Ratings surveys estimate listener numbers and are the basis for how much radio companies can charge advertisers.