The Philosophical Review/Volume 1/Summary: Scripture - Einige Beobachtungen über Schwebungen u. Differenztöne
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Einige Beobachtungen über Schwebungen und Differenztöne. Von E. W. Scripture. Phil. Stud., VII, 4, pp. 630-632.
Dove first observed that from two tuning-forks, one held beside each ear, beats would arise, though neither fork were sounding loudly enough to be heard in the remoter ear. S. concludes that the interference takes place in the central organ. He also shows that difference tones, which disappear under similar circumstances, can be heard together with beats when one fork is set before one ear and the other on the head, or when both forks are set on the head.