PIEZOELECTRICAL TRANSMISSION OF SOUND IN VACUUM: THE MUSIC OF THE ...
Now here's one that you know I just had to blog about, and in the spirit of "saving the best for the last", I saved this one for today's blog. It was spotted and shared by T.B., L.G.L.R., and we're going to add, as a bit of icing on the piezo-electric cake, an article spotted and shared by V.T.
Frankly, you can say I'm very excited and delighted by this, and for anyone having read my Giza Death Star books, including the recent installments The Giza Death Star Revisited and The Demon in the Ekur, here are the stories:
Now, in case you missed it, the authors of the paper are claiming that there is a kind of acoustic quantum tunneling that can occur in vacuum between piezoelectric materials beyond the limits of their ability to interfere with each other via electrical fields and charge; this from the abstract:
The mechanical displacements in piezoelectric materials carry along macroscopic electric fields, allowing tunneling of acoustic waves across a vacuum gap beyond the charge-charge interaction distance. However, no rigorous proof of complete acoustic wave tunneling has been presented, and the conditions to achieve complete tunneling have not been identified. Here, we demonstrate analytically the condition for such phenomenon for arbitrary anisotropic crystal symmetries and orientations, and that complete transmission of the incoming wave occurs at the excitation frequency of leaky surface waves. We also show that the complete transmission condition can be related to the surface electric impedance and the effective surface permittivity of the piezoelectric material, relevant to realize the complete tunneling experimentally. We support our findings with numerical results for the maximum power transmittance of a slow transverse wave tunneling between identical ZnO crystals. The results show that complete tunneling can be achieved for a large range of orientations. (Emphasis added)
And then there's this from a little further into their paper:
One possible mechanism for acoustic wave tunneling is piezoelectricity, as in piezoelectric materials mechanical displacements carry along macroscopic electric fields. When an acoustic wave in a piezoelectric solid impinges on a free surface, it extends a decaying, evanescent electric field into the vacuum19. The length scale of this decay is determined by the wavelength of the acoustic wave, so by bringing another piezoelectric solid within a wavelength, acoustic power can be transmitted into the second piezoelectric solid across the vacuum gap. What makes this piezoelectrically mediated acoustic wave tunneling particularly attractive is its length scale: it is not fixed to be in the nanoscale, but operates on the typically much larger wavelengthscale defined by the frequency (1 GHz would correspond to ~5 μm). The effect was introduced20,21 and observed22 long ago (for more detailed background, see Geng and Maasilta23), but developed further more recently5,23,24. In particular, a general formalism was introduced23 that is applicable to any incident bulk wave mode for any anisotropic crystallographic orientation. One of the most interesting suggestions5,21,24 is the possibility of unity transmission for some particular conditions, meaning that the incident wave could perhaps be completely transmitted into the adjacent solid. However, the discussions in previous literature5,21,24 are limited either by the simplified models used, or only show numerical results for the highest symmetry crystal orientations. Until now, no rigorous proof of complete acoustic wave tunneling has been presented, nor have generally valid complete tunneling conditions been put forward. (Italicized and boldface emphasis added)
In other words, suppose you have a large structure built from piezoelectric materials, a pyramid made of granite and limestone, for example (cough). This structure in turn is resonant to the Schumann cavity resonance of an Earth-sized planet (cough), which planet in turn is made of a great mass of (notably non-linear material...think plasma folks) piezoelectric rock. Assume that all of this in turn is resonant to a long cycle wave that takes 100 years for one wave to complete. A similarly sized piezoelectric structure within that wavelength will be able to pick up the "sound" emitted by the first... and so on and so on. Thus, such planets made of such non-linear piezoelectric rock could conceivably all be resonant to each other provided they are in a system within that wavelength permitting the acoustic tunneling to occur and, voila, we are literally talking about the music of the spheres.
And now, since acoustic waves are longitudinal waves of compression and rarefaction in a medium, and thus analogous to a "space warp" or gravity wave, consider this article spotted by V.T.:
So, yea... you can color me excited, because these recent discoveries appear to confirm, in loose fashion, my speculations concerning electro-acoustic waves, gravity, pyramids, and weapons capable of shattering planets, or communicating over vast distances via the music of the spheres...
See you on the flip side...
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