Then we made the studio broadcast of Rangers of the Sky; the program itself was one of my favorites, but that was not the main attraction. We could have heard it anywhere, on any set. Quite aside from the appeal of the program, I was fascinated by the work of a new sound-effects man who, I believed, was laying the foundation for a whole new radio technique. This chap could run a sequence of dramatic sound, without voice or music, for as much as five minutes. Sustaining the suspense, and giving it a clear meaning, too. I explained to Pauline, who seemed puzzled but interested, that some day this fellow would do a whole fifteen- or thirty-minute program of sound and nothing but sound, without voice or music of course, a drama with no words, and then radio would have grown up.

~ Kenneth Fearing, The Big Clock (p33)