Tuned intervals were paired with each member of a series of mistuned intervals and the subjects were asked to indicate which interval they preferred. The tuned intervals were those with the simple arithmetic ratios of the natural scale. The series of mistuned intervals, both flat and sharp, extended approximately half way to the next simple-ratio interval. Pure tones from beat frequency oscillators were used and the exact interval was tuned by means of Lissajous' figures on a cathode ray oscillograph. Mistuning, in terms of vibrations from the standard, was accomplished by the use of a variable pitch condenser.
Proceedings of the Iowa Academy of Science
©1937 Iowa Academy of Science, Inc.
Proceedings of the Iowa Academy of Science, 44(1), 160-161.
Available at: https://scholarworks.uni.edu/pias/vol44/iss1/74