Inner Sanctum MysteriesEpisode: The Edge Of Death (1/15/1946)

The program's familiar and famed audio trademark was the eerie creaking door which opened and closed the broadcasts. Himan Brown got the idea from a door in the basement that "squeaked like Hell." The door sound was actually made by a rusty desk chair. The program did originally intend to use a door, but on its first use, the door did not creak. Undaunted, Brown grabbed a nearby chair, sat in it and turned, causing a hair-raising squeak. The chair was used from then on as the sound prop. On at least one memorable occasion, a staffer innocently repaired and oiled the chair, thus forcing the sound man to mimic the squeak orally. source: wikipedia.org