Barton, Edwin H. (Edwin Henry), b. 1858 · London, Macmillan and Co., limited · leaf 185
22. Lord RayleigKs Model for Forced Vibra-tions.—This arrangement, shown in Fig. 44, is more elaboratethan those just described, but well repays the trouble ofmaking. In this case the simple pendulum PQ is forced tooscillate in time with the very massive pendulum from whichit is suspended. This… … Fig. 44. —Rayleighs Forced-Vibrations Model. the points C and D. It should be observed that the fourwires are of equal lengths, thus causing the bar CD to sethorizontally at right angles to the line joining the fixedpoints A and B. Hence, when this massive pendulumoscillates in small arcs, P moves…
Sound
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