Acoustic engineer offers a history of the science of "cymatics" and how it makes visible the patterns created by sound waves. He also describes his Great Pyramid experiment in which hieroglyphic patterns emerged in particles of sand vibrated by sound waves.
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Audio on Demand - New Science

12/15/2004

Acoustic engineer on his experiments, performed in the Great Pyramid, finding the prime frequency of the chamber nearly identical to the sarcophagus. His cymatics tests revealed hieroglyphic-like shapes appearing in a vibrating membrane stretched across the sarcophagus. See the photos in his 40-page book "Egyptian Sonics" available only at the Radio
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Audio on Demand - Ancient Mysteries

7/19/2002