Problem:
Why did artificially-created sound, whether in the form of radio broadcasts or records, "catch on?" Nobody was forced to buy a record player or a radio. What was the appeal, and if it was so appealing, why didn't it become popular sooner? Your answer may refer to the radio listening assignment if you like-or any other old radio programs you might care to look up on archive.org or similar sources, though you're not required to. But you should also engage with the assigned readings about sound or radio to some extent.