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HAND-BOOK OF ACOUSTICS. |
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The last is the Diatonic Semitone, and also occurs twice, viz.,
We may now calculate the vibration ratios of the remaining intervals of the scale. may be selected as the type of the
Fourth. Taking again the vibration numbers of the first scale, the vibration ratio of this interval is
This result may be verified on the Syren by opening the 12 and 9 or 16 and 12 circles. Takingas an example of aMinor Third, its vibration ratio is
This can also be verified by the Syren with the 12 and 10 circles.
and this, too, may be confirmed on the Syren, with the 16 and 10 circle.
In order to find the vibration ratio of the sum of two intervals, the vibration ratios of which are given, it is only necessary to |
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