Abstract
MR. FRAZER referred to previous results obtained by him of some examinations of the tin foil which had been indented by the stylus, or needle point, of the phonograph. His object was to ascertain the shapes of the indentations made by different known sounds. The vowels and diphthongs were spoken into the mouthpiece of the apparatus with small panels in the order seen on the diagram.
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EXAMINATION OF THE PHONOGRAPH RECORD UNDER THE MICROSCOPE 1 . Nature 18, 101–102 (1878). https://doi.org/10.1038/018101a0
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DOI: https://doi.org/10.1038/018101a0