The results found DAB was still the most popular digital listening platform, while the internet saw the biggest yearly increase.
DAB now accounts for 15.1% of all radio listening (up 20%), followed by digital TV with 4% (up 19%) and the internet with 2.9% (up 29%).
Digital listening has also increased its reach, with 19.7m people listening via a digital device each week, up 15% in the past year.
Listening to the radio via mobile devices has remained steady, at 12.6% of adults in Q1 2010. According to Rajar, younger people are more likely to access radio in this way, as 30.4% of 15-24-year-olds have listened to the radio via their mobile phone.
This story first appeared on newmediaage.co.uk