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Ernst Chladni first documented the phenomenon in the late 18th century - yet it appears to be present in a 15th century building.
Originally posted by Xeros
I can't appear to edit my own post but Here's correct video link of the chylandi patterns demontration.
Just two years ago, Dr. Clinton Rubin and his associates made a fantastic discovery. They found that exposure to frequencies between 20-50 Hz (at low dB) creates the robust striations of increased bone density, Clinton Rubin, (1999)
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It has also been found that in- phase chest wall vibration at 100 Hz, is known to decrease dysponea in patients with chronic obstructive pulmonary disease while at rest (Cristiano and Schwartzstein 1997; Nakayama, et al., 1998; Sibuya, 1994).
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There is also documentation that low frequencies, at low dB are helpful with regard to pain relief, and the healing of tendons and muscles.
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The dominant and fundamental frequency for three species of cats' purrs is exactly 25 Hz, or 50 Hz the best frequencies for bone growth and fracture healing. All of the cats purrs all fall well within the 20 - 50 Hz anabolic range, and extend up to 140 Hz.. All the cats, except the cheetah have a dominant or strong harmonic at 50 Hz.
Originally posted by Skibum
That is pretty neat.
Question though, Does the material placed over the speaker make a difference in the pattern it makes.
Wouldn't a thicker material resonate differently, or a round sheet instead of the square piece they used? Even wood vs. metal would be different, wouldn't it?
I'm not sure about the shape affecting it though.
Originally posted by Skibum
I'm not sure about the shape affecting it though.
From watching the video, some of the shapes created were clearly affected by the shape of the material.
Now don't get me wrong, I think this is a fascinating theory here.
I'm just saying, if different variables can affect the patterns made, it could make for a very difficult time in discovering how to decode the symbols properly.