If you read my NDE post you will see why I have a particular interest in this. Cymatics has already proven that water, fire, and solids can all be manipulated, altered, and/or "moved" through the application of specific sound frequencies. I believe it is just a matter of scaling this to achieve "walls of Jericho" type spectacles.@daoine-sidhe Would you have any links/references/sources available for the material you wrote about here. I am particularly interested in the House of the Spirit sound healing hospitals in Dahshur.