Noun
a conical acoustic device formerly used to direct sound to the ear of a hearing-impaired person
Source: WordNetear-trumpet
My hearing has suffered seriously; just now I am obliged to have the assistance of an ear trumpet. Think of that, my beauty! - There 's a state for your old Lover to be in! - No more tender whisperings! Imagine sweet confessions to be made through an ear trumpet! Samuel Lover
Is that an ear trumpet in your lava-lava? Kerry Jackson
Bird was the first to publish a description of such a stethoscope but he noted in his paper the prior existence of an earlier design (which he thought was of little utility) which he described as the snake ear trumpet. Source: Internet
While in Rome he suffered a severe cold, which left him partially deaf, and, as a result, he began to carry a small ear trumpet with which he is often pictured. Source: Internet