Chladni's Plates, Set of 2
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Chladni's Plates provide a fascinating visualisation of the vibrations of sound.
This Chladni's Plates kit includes a pair of square and round bronze plates, about 150mmD, mounted centrally to a clamp that can be fixed to a bench allowing the plates to vibrate freely when agitated with a violin bow. A small amount of fine sand is sprinkled on the plate, then the resin coated bow is passed across the edge of the plate so it vibrates at its natural frequency. The sand collects on the plate in the form of complex, interesting patterns.
You can change the pattern outcome by touching different points around the plate. Created in the 19th century by Ernst Chladni, Chladni’s Plates provided an early way to visualize the effects of vibrations on mechanical surfaces and is still used today in sound investigations and when designing musical instruments.
The plates are a excellent teaching resource and proide for an engaging way to demonstrate sound waves and the interaction between waves.
Age: 9 +
What You Get
Chlandi's Plates. Kit includes two Chladni Plates (square and round). a bag of sand, resin and a bow.
How Does it Work?
The Chladni Plates were created by a German scientist named Ernst Chladni in the 19th century. Chladni's research was an important part of our understanding of sound and acoustics. The plates are perfectly symmetrical and when vibrated, often using a violin bow, they form 'segments'. The number of segments depends on the size and shape of the plate. This technique of determining how sound will propagate is still used when designing musical instruments.
The sand patterns that form on the plates are due to the nodal regions where the vibration waves cancel each other out. The sand is pushed to these regions by the vibrations in the other regions.
- Sound Waves
WARNING: CHOKING HAZARD Small Parts. Not for children under 3 years.
|Age Group||9-10 Years, 11-12 Years, 12+ Years|