The connection between motion and infrasound is a discovery made by our company and is still relatively unknown. Once this fundamental law of motion in atmosphere gains recognition, the root cause of a number of effects on humans will become readily explainable, such as the effect of motion sickness symptoms being induced as a result of infrasound exposure. Infrasound exposure without motion leads to a sensory conflict, the established cause of motion sickness. A sensory conflict occurs when sensory inputs from one or more senses conflict with other sensory inputs. Since infrasound is and has always been associated with motion in an atmosphere, sensory detection of infrasound without other motion cues will cause sensory conflict in some people, leading to motion sickness symptoms.
Exposure to infrasound at about this frequency alone may therefore directly result in sensory conflict in people who are sensitive to pressure changes, since the acceleration, visual and somatosensory stimulations normally also present with cyclic
pressure fluctuations are absent, which based on the previous discussion is defined as sensory conflict, the widely accepted cause of motion sickness and Sopite Syndrome. Sopite Syndrome symptoms can include sleep disruptions, drowsiness, fatigue, vertigo, headache, confusion and at the extreme, nausea and vomiting.
In a paper published in March 2014 titled: Significant Infrasound Levels A Previously Unrecognized Contaminant In Landmark Motion Sickness Studies (ASA publication 2 below), we demonstrated that a model based on infrasonic barometric pressure fluctuations alone, predicted the Motion Sickness Incidence with about the same accuracy as a much more complex model based on vertical acceleration. This finding shows quite clearly that what is normally identified as vertical motion sickness can be attributed to infrasound exposure alone in some people, and is supported by a scientifically controlled experimental study described in a Ph.D thesis by David Nussbaum (1985).
It was shown that the probability that sensitivity to motion sickness and sensitivity to wind turbine acoustic emissions are unrelated is less than 2 in 1,000,000.
The authors also stated (about a minority of the test subjects) in this extensive report (41 pages plus 13 pages of graphical data):
The adverse responses of some individuals closely resemble motion sickness. Individual differences in the reaction to infrasound may then be explained by variability of inner ear structure or central adaptive mechanisms.