microphonographn.
/ˌmʌɪkrə(ʊ)ˈfəʊnəɡrɑːf/, /ˌmʌɪkrə(ʊ)ˈfəʊnəɡraf/, U.S. /ˌmaɪkroʊˈfoʊnəˌɡræf/ Now rare. Perhaps disused.
An instrument for recording and amplifying sound, which was designed to render sound audible to deaf persons.
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the world > health and disease > healing > audiology or audiometry > [noun] > aids to defective hearing
trunk1546
otacousticon1615
otacoustic1617
ear-spectacle1626
sarbacane1644
acoustic1659
acousticon1660
hearing-trumpet1725
ear trumpet1731
trumpet1774
otophone1839
auricle1864
audiphone1880
osteophone1892
microphonograph1897
hearing aid1922
deaf-aid1934
1897 Daily News 26 Mar. 2/2 The microphonograph he [sc. Professor Dussaud] has just issued to the world magnifies the human voice in the same way as a lens magnifies a picture.
1898 Nature 13 Jan. 255/2 It is suggested that the micro-phonograph may become an important factor in the education of deaf and dumb subjects.
1902 Harper's Mag. Feb. 496 It has been variously designated as the ‘telegraphone’, the ‘microphonograph’ and the ‘magneto-phonograph’ in Europe.
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).
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n.1897