Barton, Edwin H. (Edwin Henry), b. 1858 · London, Macmillan and Co., limited · leaf 77
noted that here, since the periods are quitedifferent, the phase is not constant, hence the term initialphase-difference. The previous description of Figs. 14 and 15, and thenumerals on these two figures, will make the method ofdescription clear enough. 58 SOUND CHAP. II Analytical Treatment.—The… … Fig. 17.—Composition with Periods 2:1, but in Different Phases. which is the general equation for any phase-difference andamplitudes. Hence, for S = 0, this becomes ^Y--ix)+-=o b2 \b2 9 (I which is the equation of the curve in Fig. 16.as in Figure 17, we oh tain V * Y „ +—1 =o w (2), For 8 = tt/2 a…
Sound
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