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EG-54 Chladni Plates
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A set of four plates designed to fit on the Electromechanical Driver illustrates the vibration modes of thin plates. The plates attach to the driver which allows them to vibrate as free-edge plates. The resonance frequencies are in the range of 200 to 8,000 Hz. Since the plates are made of black anodized aluminum, the nodal patterns formed by the white sand have a high visual contrast.
Three of the plates are simple shapes: a circle, square and triangle. Their vibration modes at low frequencies are simple geometric patterns. The fourth plate is shaped like a violin back and exhibits more complex modes. Our set includes a shaker of white sand for observing the nodes in the vibration pattern. |
| A set of accessories for the Audio Driver and the Electromechanical Driver provides a satisfying afternoon of investigation into vibrations and sound. The set attaches to the shaft of the EG-52 Electromechanical Driver and illustrates the relationship between resonant frequency and length. Students can observe both the first and second vibration modes and determine the ratio between them.The string is tensioned by the weights and weight holder. Your class can examine the effect of length and tension on the resonant frequency of the string. |
EG-55 Vibrations in Strips & Strings
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