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phonolaryngoscope
phonolaryngoscope n. 
/ˌfɒnə(ʊ)ləˈrɪŋɡəskəʊp/, /ˌfoʊnoʊləˈrɪndʒəˌskoʊp/ rare an instrument used to observe the function of the larynx during the production of speech sounds.
Brit. /ˌfəʊnə(ʊ)ləˈrɪŋɡəskəʊp/
, /ˌfəʊnə(ʊ)ləˈrɪŋɡəskəʊp//ˌfɒnə(ʊ)ləˈrɪŋɡəskəʊp/U.S. /ˌfoʊnoʊləˈrɪŋɡəˌskoʊp/
, /ˌfoʊnoʊləˈrɪŋɡəˌskoʊp//ˌfoʊnoʊləˈrɪndʒəˌskoʊp/ΘΚΠ
the mind > language > linguistics > study of speech sound > [noun] > instruments or diagrams
phthongometer1837
logograph1879
glossograph1883
palate-myograph1884
palatogram1902
tongue-curve1902
kymograph1918
voiceprint1918
vowel diagram1932
kymogram1934
speech stretcher1948
word-palatogram1948
recognizer1949
phonolaryngoscope1953
speech recognizer1953
grid1961
voiceprinter1966
1953 L. F. Brosnahan Some Old Eng. Sound Changes 11 The production of each of the Dutch vowels, as observed with Russell's ‘phono-laryngoscope’.
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