I'll quote Allan H. Frey, who more-or-less(preceeded by some italian engineers, iirc) invented the entire field, from 1996 on usenet:

>There is a microwave hearing effect that occurs at very low power densities and a skull vibration effect that occurs when very high energies are applied to the head. There is some confusion in the literature because the vibration effect has often been referred to as a microwave hearing effect, but it is not the same phenomena.

And, quoting from a different page:

>In fact, Frey and Hackett said the microwave hearing effect does not occur with millimeter waves (which range from 3 to 300 GHz).

>

>"On the other hand, if your millimeter waves have enough energy density, are powerful enough, there are other phenomena where you could cause sort of a concussion kind of effect which could conceivably be heard by bone conduction. It would transfer through skin to bone and bone into the inner ear," Frey said. He said it might be possible to modulate such energy to create the perception of some intelligible sounds. "But off hand, I can't tell you what kind of power levels you might need to do that," he said. Hackett dismissed the idea of transmitting intelligible sounds to the head with MMWs as pure speculation.

Note how the mythbusters episode where they 'busted' that myth seems like an (unintentional) sham:

They used a 9.4 GHz radar dish (courtesy of the DoD) with ultra short impulses spread out over long periods. That fits NEITHER of the above.

Someone, on, OF FUCKING COURSE, /r/conspiracy, quite a while ago, pointed out something related:

https://www.reddit.com/r/conspiracy/comments/77v6t1/reddit_d...

Which points out that the boxspring mattresses used in many Hotels might strongly amplify the ability to induce tissue damage, which would explain this part:

"The blaring, grinding noise jolted the American diplomat from his bed in a Havana hotel. He moved just a few feet, and there was silence. He climbed back into bed. Inexplicably, the agonizing sound hit him again. It was as if he’d walked through some invisible wall cutting straight through his room."

From https://www.apnews.com/697536f065e6470eaa5ccfc35061e7ce

Of course, back then, almost everyone dismissed this. Or did they? (Insert dramatic music here)

Here, some more quotes from Allan H. Frey, via http://www.the-scientist.com/?articles.view/articleNo/32648/...:

>For example, after my colleagues and I published in 1975 that exposure to very weak microwave radiation opens the regulatory interface known as the blood brain barrier (bbb), a critical protection for the brain, the Brooks AFB group selected a contractor to supposedly replicate our experiment. For 2 years, this contractor presented data at scientific conferences stating that microwave radiation had no effect on the bbb. After much pressure from the scientific community, he finally revealed that he had not, in fact, replicated our work. We had injected dye into the femoral vein of lab rats after exposure to microwaves and observed the dye in the brain within 5 minutes. The Brooks contractor had stuck a needle into the animals’ bellies and sprayed the dye onto their intestines. Thus it is no surprise that when he looked at the brain 5 minutes later, he did not see any dye; the dye had yet to make it into the circulatory system.

Some more points:

https://nyaspubs.onlinelibrary.wiley.com/doi/full/10.1111/j.... From 1975 presumably what Frey refers to in the above paragraph, entitled "NEURAL FUNCTION AND BEHAVIOR: DEFINING THE RELATIONSHIP"

http://www.tandfonline.com/doi/abs/10.3109/15368378209040347 here, a review from 1982, very much related to the previous quote, entitled "Microwaves and the Blood-Brain Barrier: A Review"

http://www.tandfonline.com/doi/pdf/10.3109/15368378309040355 and here is a letter correcting that review, sort of. Unfortunately, this letter never got cited in the scientific literature, while the above review did.

For more bibliographical information, one might also wish to examine this email by Allen L. Barker from 2002:

https://archive.fo/V3r0Y (THEORETICALLY also available here, but the domain behind this, http://iubio.bio.indiana.edu/, is unreachable from large parts of the internet from what I can tell: http://www.bio.net/mm/neur-sci/2002-May/048366.html)

Of course, EVERYTHING surrounding this (but NOT the subject matter ITSELF) involves a hell of a lot of:
* conspiracy theory
* fringe science (aka protoscience)
* pseudoscience

levels of insanity, as you can likely tell from some of the above. This makes it extremely hard to filter through any of this. The EU did a large report on RF safety a while ago:

https://ec.europa.eu/health/sites/health/files/scientific_co...

If you check it, Frey's papers on this remain oddly absent from it.

Oh and... We could likely find a lot more existing discussion on this, but unfortunately, the emf-bio archives got expunged from ftp://iubio.bio.indiana.edu/usenet/bionet/emf-bio without explanation. If anyone at the University of Indiana wants to go digging into backup tapes, I'd appreciate it.