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North American steam locomotive whistles have different sounds from one another. They come in many forms, from tiny little single-note shriekers to larger plain whistles with deeper tones (a deep, plain train whistle is the "hooter" of the Norfolk & Western, used on their A- and Y-class Mallet locomotives).
The speed of sound in steam is predictable if steam dryness is known. [45] Also, the specific volume of steam for a given temperature decreases with decreasing dryness. [46] [39] Two examples of estimates of speed of sound in steam calculated from whistles blown under field conditions are 1,326 and 1,352 feet per second. [47]
So, locomotive air horns were created that had a much higher, more musical note, tonally much more like a steam whistle. This is why most train horns have a unique sound, different from that of road going trucks, although many switch engines, which didn't see road service (service on the main lines), retained the deeper truck-like horns.
These devices are whistles that do not radiate sound, but are still aerodynamic whistles. The upper figure on the right shows the basic arrangement of one version of the device. The circle on the left is the fluid source (air or liquid). A jet is formed that either goes into the upper or lower channel. The black lines are the feedback paths.
Steam whistle from a supertanker, in Merseyside Maritime Museum, United Kingdom An air horn is a pneumatic device designed to create an extremely loud noise for signaling purposes. It usually consists of a source which produces compressed air , which passes into a horn through a reed or diaphragm.
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 December 2024. This is a list of onomatopoeias, i.e. words that imitate, resemble, or suggest the source of the sound that they describe. For more information, see the linked articles. Human vocal sounds Achoo, Atishoo, the sound of a sneeze Ahem, a sound made to clear the throat or to draw attention ...
The project was inspired by Segal's personal experience organizing a whistle-stop campaign tour for Republican U.S. Rep. Mickey Edwards of Oklahoma, for whom he was serving as press secretary in 1984.
The whistle was used to salute the providing ship following underway replenishment. The plume of steam marks the whistle location in this salute following refueling from the guided missile cruiser USS Chicago (CG-11), circa in 1970.
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