steam whistle
steam whistle is a whistle.
Overview
Device used to produce sound with the aid of live steam, which acts as a vibrating system.
In detail
Its recorded use is signalling whistle.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Steam whistle”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1765082: steam whistle
Consult the source