By Robert W. Endlich
This is a story of the discovery of a new effect of sonic vibrations, Vibro-Acoustic Disease, but it is a far cry from the sounds of human voices, birds, or the rustle of breezes through leafy trees. It is the story of discovery of dangerous low frequency infrasound, frequencies below what humans normally hear and measure for protection from deafness. It is the story of low frequency infrasound causing debilitating effects on humans and other forms of animal life.
A Portuguese Doctor finds problems with Aircraft Maintenance Workers
This story starts in 1980 when Dr. Nuno Castelo Branco was assigned as chief medical officer at OGMA, the Portuguese Air Force 
Aeronautical Plant near Lisbon, and his visits to his workers while at their work sites; one such occasion occurred during an aircraft engine run-up. One of the maintenance workers on duty during the run-up wandered towards the turbine engine exhaust, seemingly without purpose, and a colleague grabbed him before he was injured. Dr. Castelo Branco observed this abnormal behavior, called “automatism,” and, after examining medical Continue reading “A story of Vibro-Acoustic Disease, VAD”