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Additional resources for Cymatics: A Study of Wave Phenomena & Vibration

Sample text

32 26 33 27-30 The four figures reveal approximately the same pattern but the number of elements grows as the pitch increases. In figures 27 to 30 the frequencies are 1690, 2500, 4820, 7800 cps, respectively. Steel plate 23x23 cm. Thickness 1mm. 34 3 Examples of Cymatic Phenomenology Some examples will now be given of vibrations rendered visible. What we actually witness here is the effect of vibration. The effects produced by vibration in this or that material, in this or that medium — that is what is to be demonstrated.

Here again use was made of a steel plate (23x23 cm and 1 mm thick). The size of the plates can, of course, be varied at will. We have used plates ranging from the size of the ear drum (approx. 7x9 mm) to 70x70 cm. ). Apart from the rule that the number of elements increases with the frequency, a variety of other observations may be made of the sonorous figures (Figs. 36-42). Since the process can be stopped at any stage, the formation of nodal lines can be followed step by step. The observer can see how the particles are transported 35 and how two lines draw together In the marginal zones turbulent areas can be seen in which the particles form vortices.

The simplest case is shown in Fig. 59. This is a film of liquid a few centimeters in diameter. To make the pattern of currents visible, a black dye was used as an indicator. It will be seen that a pair of eddies is formed symmetrically. Here again the speed of rotation is proportional to the amplitude. Fig. 60 shows the process by which the eddies are generated. This experiment, however, is performed with a sheet of liquid about 23 cm across which is made to vibrate by a tone (frequency 100 cps).

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