Speaking trumpet

Definition and stakes

Project Gutenberg,  The Gutenberg Webster's Unabridged Dictionary…

“ A funnel, or short, fiaring pipe, used as a guide or conductor, as for yarn in a knitting machine.
Ear trumpet. See under Ear. — Sea trumpet (Bot.) , a great seaweed (Ecklonia buccinalis) of the Southern Ocean. It has a long, hollow stem, enlarging upwards, which may be made into a kind of trumpet, and is used for many purposes. — Speaking trumpet, an instrument for conveying articulate sounds with increased force. — Trumpet animalcule (Zoöl.) , any infusorian belonging to Stentor and allied genera, in which the body is trumpet-shaped.
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Source: Gutenberg

Portrait of William Walker Atkinson William Walker Atkinson,  Genuine Mediumship; or, The Invisible Powers

“ A spirit speaking in the faintest whisper through the trumpet is enabled to have its voice heard plainly by those present in the circle, where otherwise nothing would be heard. Often the spirit force is so strong that it will pick up the trumpet and carry it around the circle, tapping the various members thereof, and whispering through it into the ear of some particular members. Weak spirits, therefore, who are unable to make themselves heard in the ordinary way, often employ the trumpet with effect in seances. ”
Source: Gutenberg

John Weeks Moore,  Complete Encyclopaedia of Music… (1880)

“ The sounds produced by instruments are chiefly musical. Kratzeustein and Kempelen have, however, by making experiments on the effects of pipes of different forms, succeeded in constructing such as will imitate very accurately the different vowel sounds produced by the human voice. The speaking trumpet is an instrument intended for transmitting sound to considerable distances in a particular direction. ”
Source: Wikisource

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