Here are some sample topics, just for you to get a sense of topic inspiration:
On the Internet Archive website you will find recordings of Old Time Radio
1. drama, online at https://archive.org/details/oldtimeradio. Listen to two or three episodes of a radio drama such as Lights Out (1934-1947), The Shadow (1930s), or CBS Radio Workshop (1956-57) and write and analyse about this example of radio drama
2. Record or listen to s podcast of an episode of a weekly show on CBC Radio 1 such as C?est la vie (a weekly program about French-speaking Canada), The Next Chapter (a weekly program about books), The House (a weekly program about politics in Canada), Quirks & Quarks (a weekly program about science) and compare it with an Internet podcast. There are some suggestions here:
http://www.vox.com/2014/12/21/7430313/podcast-recommendations-reviews How is the radio program different from the podcast? What do you think makes a successful podcast?