Ludimar Hermann
German physiologist and speech scientist / From Wikipedia, the free encyclopedia
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Ludimar Hermann (October 31, 1838 ā June 5, 1914) was a German physiologist and speech scientist who used the Edison phonograph to test theories of vowel production, particularly those of Robert Willis and Charles Wheatstone. He coined the word formant, a term of importance in modern acoustic phonetics. The Hermann grid is named after him; he was the first to report the illusion in scientific literature.