sudrophone
sudrophone is a valve horns with wider bore.
Overview
Valved brass instrument employing a buzzing membrane.
In detail
Recorded constituent parts are piston valve and kazoo.
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
“Sudrophone”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q3976676: sudrophone
Consult the source