Bud Abbott : A little bit of trivia

A little bit of trivia

In their first film ONE NIGHT IN THE TROPICS, Abbott and Costello are heard first before they are seen by the audience. This is mentioned on the production notes of that film. I noticed that they continued this with a few of their next films, where both or one of them is heard before being seen.

Nothing important, just wondered if this was something done on purpose. Abbott and Costello were popular on radio before making movies and that was said to have been the reason for the way they were introduced to film audiences.