Moving Boulders with a Push of the Finger: Did Sound Help to Build the Megaliths?

Can sound vibrations be utilized to help move heavy stones via sonic or acoustic lubrication?


ACOUSTIC LUBRICATION

"Acoustic or sonic lubrication occurs when sound (measurable in a vacuum by placing a microphone on one element of the sliding system) permits vibration to introduce separation between the sliding faces. This could happen between two plates or between a series of particles. The frequency of sound required to induce optimal vibration, and thus cause sonic lubrication, varies with the size of the particles (high frequencies will have the desired, or undesired, effect on sand and lower frequencies will have this effect on boulders).

Examples
If there is a dynamic coefficient of friction between two objects of 0.20, and vibration causes them to be in contact only half of the time, that would be equivalent to a constant coefficient of friction of 0.10.This substantial reduction in friction can have a profound effect on the system.
An example occurs during landslides. Most landslides do not involve this effect, but occasionally the frequency of vibrations caused by the landslide is optimal to cause the boulders to vibrate. In this case, feedback causes the boulders to slide much farther and more quickly than typical, which can pose an increased danger to those in their path. One notable feature of such a landslide is that it appears to resemble flowing water, or mud, and not the dry sliding rocks that they were seconds earlier."

Source: https://en.wikipedia.org/wiki/Acoustic_lubrication

Garrett Sutton, BME

Тэги:

#Acoustic_Lubrication #Sonic_Levitation #Ancient_Technology #Megaliths #Friction #Sliding_Surfaces #Resonance #Raleigh_Waves #Moving_Boulders #Sound_Vibrations #John_W._Keely #Ed_Leedskalnin #Coral_Castle #Stonehenge #The_Great_Pyramids #Standing_Stones #Baalbeck #Acoustic_Levitation #Sound_Technology

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