The number of people in the UK listening to digital radio via the internet has soared.
In the six months up to May this year, there were 2.5 million more radio listeners online up from 8.1 million in November last year.
Users were either listening live or listening again through a catch-up service.
The findings released by radio research company Rajar also showed almost 2 million extra weekly podcast listeners – a total of 3.7 million listeners.
And 6 million people said they had downloaded a podcast, with the average podcast user spending just over an hour a week listening to them.
The survey asked people whether they had ever listened to the radio via the internet and found that 14.5 million had done so.
The average user of catch-up services listened, on average, to almost two programmes each week and half said they were listening to programmes they hadn’t tuned into previously.
iTunes was the software of choice for almost three quarters of podcast users, with slightly more listening on their home computer rather than an MP3 player.
Half the respondents in the survey said they would be interested in downloading podcasts containing advertising if they were free, while less than a third were happy about the idea of paid-for podcasts without adverts.
Christel Lacaze, research manager at Rajar, said: ‘This survey gives a unique insight into the behaviour of the online/offline audio community.’