Rubens tube.

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emgcr
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Rubens tube.

Post by emgcr »

I am sure most phonograph/gramophone enthusiasts will know of this wonderfully easy and clear way of seeing sound waves but just in case not..................

http://www.youtube.com/watch?v=HpovwbPGEoo

http://www.youtube.com/watch?v=gpCquUWqaYw

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