Radio Advertisements

To me the most interesting thing about radio advertising was that many advertisers were responsible for creating the broadcast content directly, as opposed to modern TV ads which go in between content created by others. Radio advertisements were the first place that jingles were used. These often were design to both help audiences remember the name of the product they were trying to sell, and also associated positive vibes around it. Advertising was such a monstrous industry, that they had to create an accountability agency to ensure that no advertisers were lying about circulations.




http://adage.com/article/75-years-of-ideas/1930s-radio-captivates-a-nation/102701/
http://xroads.virginia.edu/~class/am485_98/graham/visitor.html