vamphorn

[ vamp-hawrn ]
/ ˈvæmpˌhɔrn /

noun

a megaphone in use during the 18th and early 19th centuries for public address in church services.

Origin of vamphorn

vamp1 + horn; so called from its use in amplifying one voice as an accompaniment in choral singing
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019