After the introduction of regular radio broadcasting in the United States in 1920, the medium quickly spread across the United States, providing an easy, effective way of communicating with large, geographically dispersed audiences. As radio technology became cheaper and more widespread, Americans across the country used it to listen to speeches, radio dramas, music, and news of what was going on in the nation and around the world.
Farmer Listening to Radio, 1933. Records of the Office of the Secretary of Agriculture, 1839–1981, Record Group 16, National Archives.