Abstract
IT is well known that Helmholtz traced all discordant effects of two or more musical notes when sounded together to the presence of beats occurring between the prime tones, between the prime of one and an upper partial of the other, between the upper partials of each, or to beats occurring in some other way. Further, to produce the unpleasantness in question the beats must lie between certain limits of frequency, which limits vary with the pitch in use.
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The Upper Limits of Unpleasant Beats . Nature 104, 708 (1920). https://doi.org/10.1038/104708b0
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DOI: https://doi.org/10.1038/104708b0