Let’s look at the homework. Once every 15 cycles, all four crystals line up. Once every 375 microseconds, all the crystals are pushing.  So we could expect an audible tone at 2667 Hz. There is also a half-height reverse pulse in the middle of these, which combines to a second harmonic. In fact,  a variety … Continue reading Havana Sonic Attack Weapon — Let’s Build It! Part 6 →

Given Russian strengths in physics and weakness  in electronics, the Russian solution is likely to be what is called “simple and elegant”, more like the carburetor of an old-fashioned car than fancy electronic fuel injection. Our gadget needs parts that actually make noise. Loudspeakers make sounds like human voices, music, bells, chimes, whistles, anything you … Continue reading Havana Sonic Attack Weapon — Let’s Build It! Part 5 →

Let’s refer back to the Polish paper quoted in Havana Sonic Attacks — Addendum for techies only: Roshchin and Dobroserdov indicated that levels of 90–110 dB within the range of lower frequencies (21kHz) and 110–115 dB within the range of higher frequencies (40kHz) constituted the limit of occurrence of functional changes [36]. Since we’re designing … Continue reading Havana Sonic Attack Weapon — Let’s Build It! Part 4 →

I was going to get right to blowing up Patient Zero’s head. But then I remembered that there might be someone in the audience whose sole purpose in life is to make the presenter miserable, by asking a show-stopper question. Richard Feynman, known for his kindness in all other ways, was famous for this. Some … Continue reading Havana Sonic Attack Weapon — Let’s Build It! Part 3 →

Let’s continue building our hypothetical device. If it’s doable, it is probably shaped by the considerations that follow. Note: if what follows is correct, the attacks should correlate to nights of low wind velocity, with the position of the attacker  sheltered from wind by a building wall. Absolute calm is essential. If you want to … Continue reading Havana Sonic Attack Weapon — Let’s Build It! Part 2 →

We’re not actually going to. This will be informed speculation, guided by open source physics and electronics. But perhaps it will inspire some young budding Dr. Evil to a lifetime of work. It all depends on your idea of fun. Let’s consider the general shape of the package: Futuristic. Eventually, all surfaces will be active. … Continue reading Havana Sonic Attack Weapon — Let’s Build It! Part 1 →

(CNN) US investigating possible mysterious directed energy attack near White House. Quoting CNN, Federal agencies are investigating at least two possible incidents on US soil, including one near the White House in November of last year, that appear similar to mysterious, invisible attacks that have led to debilitating symptoms for dozens of US personnel abroad. … Continue reading (CNN) US investigating possible mysterious directed energy attack near White House →

(CNN)‘Sonic attacks’ suffered by US diplomats likely caused by microwave energy, government study says. Download the National Academy of Sciences report (pdf) here. I wrote 16 articles on the attacks, which advance the theory that: Ultrasound was weaponized and beam-formed. The ultrasound was pulsed, for reasons analogous to the pulsed microwave of the NAS report. … Continue reading (CNN)’Sonic attacks’ suffered by US diplomats likely caused by microwave energy, government study says →

(CNN) Microwaves suspected in ‘sonic attacks’ on US diplomats in Cuba and China, scientists say. This is about the newly popular theory that microwaves, not ultrasonic sound, are responsible for the brain injuries of U.S. diplomats in Cuba and China.  Golomb’s paper (pdf) Diplomats’ Mystery Illness and Pulsed Radiofrequency/ Microwave Radiation is a plausibility argument. … Continue reading Havana “Sonic” Attacks; Microwaves? →

This article sketches another design for an ultrasound weapon. CNN: Study: US personnel suffered ‘symptoms resembling brain injury’ in Cuba. Quoting, The report found “audible or sensory phenomena” were from an unknown source but came from a specified direction. In conclusion, the authors say their study raises “concern about a new mechanism for possible acquired … Continue reading CNN: US personnel suffered ‘symptoms resembling brain injury’ in Cuba; New Weapon Design →