thermophonen.
/ˈθəːməʊfəʊn/ An apparatus in which sonorous vibrations of a diaphragm are produced by heat-rays.
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society > communication > telecommunication > other types of sound telecommunication > [noun] > apparatus
telephone1832
electrophone1864
magneto-telephone1878
thermophone1878
photophone1880
radiophone1881
teleradiophone1881
thermotelephonea1884
telegraphophone1889
theatrophone1889
hydrograph1893
sonobuoy1937
1878 Th. Wiesendanger in Engineer XLVI. Nov. 335 The Thermophone. A new source of sound for the telephone.
1881 A. G. Bell in Nature 12 May 44/1 We have decided to adopt the term ‘radiophone’..limiting the words thermophone, photophone, and actinophone to apparatus for the production of sound by thermal, luminous, or actinic rays respectively.
1902 T. O'C. Sloane Standard Electr. Dict. 537 Thermophone, an apparatus for reproducing sounds telephonically by the agency of heat; a receiving-telephone actuated by heat.
This entry has not yet been fully updated (first published 1912; most recently modified version published online March 2018).
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n.1878- supervisal
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