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In terms of Physics, we could first consider energy. If you 'play' it by tilting it one way and then the other, then your arm is the source of energy. The beads inside are initially supplied in this way, with gravitational potential energy. As they fall, they lose it to gain kinetic energy. However they continually collide with the spikes, and with each other. In this way, some of the energy converts to sound. Because of the randomness and nature of the collisions, I would imagine that the sound could be described as 'white noise', sound which consists of a wide range of frequencies. The frequencies that would be reinforced would be the ones that would resonate due to the dimensions of the case. That is, the length, and the diameter.
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∙ 11y ago
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