Claim: Giza Plateau: discovery of a huge city under the Pyramids

[MapperGuy]

If their method really worked as advertised it would have not only a great scientific impact but also a great military importance... if I were in Biondi et al. I would have rushed to publish all the algorithms and data asap: being the only one to know such a secret would make me really uneasy... This did not happen for what I know, so I'm not really convinced their method works at all.

Indeed. The value to this method to superpower militaries should not be underestimated. Russia, China, North Korea, Iran and others have spent vast amounts of time and resources to build underground facilities. To possess this method would be be of great value both offensively (know where to shoot) and defensively (know which of your facilities may be unmasked).

Not to mention that unlike these people, who have to buy their radar data from commercial sources, governments could use their own classified radar systems to collect data tailored to maximize the effectiveness of this method. I hope the developers have patented what can be patented and are offering their services to friendly militaries (for a fee of course).

Be careful what you invent, it may attract attention both positive and dangerous.

 

[Gary C]

One thing I did not see in the reviews or criticisms (or perhaps just didn't understand) was the effect of the pyramid's physical construction on the propagation of sound waves. In the other illustrated uses of tomography both volcanoes and mountain massifs represent fairly well understood classes of solid, semi-continuous materials compacted over geologic time scales, or settled according to well studied compaction forces and that can be sampled directly by drilling into representative exemplars. We understand their acoustic properties at relevant scales.

The pyramids are neither. They are composed of discontinuous areas of loose fill, roughly worked stone, and finely worked stone displaying a complex array of sound propagation behaviors. Did the authors at any point refer to the methodology used to account for the acoustic behavior of the actual pyramids?

Edited: left out a word