The whistle comes from The Spirit of '43, a Donald Duck short released in 1943, where it was used as a piece of industrial sound design rather than as dialogue or music. The recording later entered stock sound libraries, including a Hollywood Edge collection of boat and train whistles, which helped it reach editors and soundboard users. Because the blast is short, clear, and easy to recognise, creators still reuse it to set a nautical or factory setting in seconds, long after its original cartoon context has faded.