Reading Bresland's text was already attention-grabbing, but hearing the audio made a much larger impact. First of all, the addition of a non-linguistic, bluesy sound element gave the text is an intriguing atmosphere. But it wasn't so distracting that you couldn't focus; it complimented his words nicely.
The dark Eiffel Tower facts invoke greater emotion when read aloud, as does Bresland's description of Katja. You can tell that he put thoughtful consideration into where the accompanying music would be loud or soft, and which words would be highlighted. The example seems to represent Ira Glass's description of broadcasting as a process of trial and error in order to cut through the waste and get to something special.