	a telegraph making audible signals; a telephone.
	See under Acoustic.

See also: Acoustic, Telegraph

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.

References in periodicals archive

Following the success of the harmonic telegraph, Bell developed an acoustic telegraph (one that transmitted vocal notes) and embarked upon a patent race with Elisha Gray, who was working on an acoustic telegraph that relied on a water transmitter.

A conversation with the inventor of the telephone: Q & A with Alexander Graham Bell

The motivation for inventing the phonograph was the desire to record messages from acoustic telegraphs and telephones, and Edison initially used a paper-indenting mechanism from an early telegraph invention.

He had been working on acoustic telegraphs to transmit musical tones telegraphically, which one of his patents called a "telephonic telegraph apparatus." He then took out eleven patents for "speaking telephones" and related inventions through the end of the 1870s.

Did the telegraph lead electrification? Industry and science in American innovation

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Acoustic telegraph