https://www.billboard.com/biz/artic...ing-radio-for-digital-only-listening-on-their
Here is the study and the sample was obtained in a 5 year period.
Listeners are moving away from AM/FM radio towards digital-only listening via their mobile devices at an increasingly faster rate, according to data from Edison Research's Share of Ear study, gathered between 2014-2019.
Released on April 10, the ambitious Share of Ear study aims to comprehensively measure Americans' listening habits across all of the audio options available from a consumer perspective. In brief: according to highlights from the research project that were reviewed on music streaming service Pandora's For Brands site, the amount of audio Americans have been listening to per day since 2014 has not changed. (In case you were wondering, it's four hours, a little over half the 7 hours and 50 minutes of television that U.S. residents watched per day as of 2018.) It's what they listen to, and how, that has shifted dramatically.
Here is the study and the sample was obtained in a 5 year period.