Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 376
that the holes areirregularly instead of regularly spaced aboutthe circumference of the disk. The musicalcharacter of the tone will altogether disappear. The experiment furnishes a verystriking illustration of the difference be-tween a musical sound and a noise.Only those sounds possess a musical… … Fig. 347. Regularity of pulses the condition for a musical tone 386. Pitch. While the apparatus of the preceding experiment isrotating at constant speed, let a current of air be directed first againstthe outside row of regularly spaced holes and then suddenly turnedagainst the inside row, which is…
Physics
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