“The Squawk Box was a developmental weapon initiated by a joint military/civilian group of scientists and technicians working in secrecy and with a high degree of autonomy in Lisburn (New Scientist, Sept 1973). Mounted on a Land Rover or similar carrier vehicle, this device housed in a 3ft cube was able to emit two marginally different frequencies (eg 16,000 & 16,002 Hz). These component frequencies, their sum and difference, produced a subsonic harmonic of 2Hz (infrasound). It’s effective beam was so small and directional that it could target individuals, producing ‘spooky’ psycho-physiological effects such as panic, vomiting, and seizures. It is worthy of note that infrasound is particularly effective in the arousal of fear or anxiety. The experience of auditory stimuli is a function of the nervous system. We are culturally conditioned to interpret sounds, and recognise them, which is why we are roused to anxiety by an experience we can neither interpret nor dismiss as 'noise’. The very fact that infrasound can be 'felt’ but not heard creates a frustrated perceptual impulse. Anxiety can only be resolved by attaching it to an object or cause. In the absence of either, we tend to create one, and in most instances we create a supernatural or preternatural one.”