phonendoscopen.
/ˌfəʊnˈɛndəskəʊp/, U.S. /ˌfoʊnˈɛndəˌskoʊp/ Medicine. Now rare.
A type of stethoscope having a chest piece consisting of a flattened circular chamber closed by a diaphragm (originally two movable discs), providing relative amplification of certain auscultatory sounds.
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the world > physical sensation > hearing and noise > audibility > sound magnification or reproduction > [noun] > other amplifying devices
micracoustic1684
microphone1684
polyacoustic1684
resonator1864
resonance cavity1867
resonance chamber1870
aerophone1878
megaphone1878
sphygmophone1879
phonendoscope1895
auxetophone1904
stentorphone1921
1895 Specif. Patent 10,223 (p. i, 1. 35) If this ‘phonendoscope’ be brought into contact with any solid body..the tone-vibrations in that solid body will communicate themselves to the point of contact.
1897 L. Robinson Wild Traits 262 I took my phonendoscope (..a form of stethoscope somewhat on the microphone principle).
1909 H. Cushing in A. F. Wallace Progress Plastic Surg. xvi. 146 A head band with receiver and tube leading from a phonendoscope.
1965 Amer. Jrnl. Cardiol. 15 525/2 For the high-pitched sounds he [sc. Paul Dudley White] used the phonendoscope chest piece.
2004 Jrnl. Clin. Anesthesia 16 344/1 Occurrence of gastric insufflation (e.g., presence of epigastric sounds with the phonendoscope during ventilation) or regurgitation..were also evaluated.
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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n.1895