Distinctive and memorable voices

Actors frequently made it in the movies or on television because of their appearance. Either they possessed remarkable beauty, or they had some distinctive feature that made them memorable, such as Jack Elam's wall eye. This fact was just as true on radio, but there it was how the actors sounded, not how they looked. Thus, when we see pictures of some of the actors, we are a little surprised at their lack of attractiveness; but it just was not necessary on radio.