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Infrasound arrays at monitoring station in Qaanaaq, Greenland.. Infrasound, sometimes referred to as low frequency sound or incorrectly subsonic (subsonic being a descriptor for "less than the speed of sound"), [1] describes sound waves with a frequency below the lower limit of human audibility (generally 20 Hz, as defined by the ANSI/ASA S1.1-2013 standard). [2]
Infrasound sensitive fibers are found to be simple bipolar cells in the auditory ganglion with a diameter of 1.6-2.2 μm at the axon and 0.9-1.2 μm at the dendrites. [19] They originate in the apical end of the cochlea and they are located near fibers that transmit low frequency sounds in the acoustic range.
In fear conditioning, the main circuits that are involved are the sensory areas that process the conditioned and unconditioned stimuli, certain regions of the amygdala that undergo plasticity (or long-term potentiation) during learning, and the regions that bear an effect on the expression of specific conditioned responses. These pathways ...
Vladimir Gavreau, born Vladimir Gavronsky (1904 – 1967), [1] was a French scientist making experiments on the biological effects of infrasound. Gavreau was born in Moscow . His interest in infrasonic waves first came about in his lab during the 1960s, when he and his lab assistants experienced pain in the ear drums and shaking lab equipment ...
[13] [14] Their research led them to conclude that infrasound at or around a frequency of 19 Hz, [2] [11] [15] has a range of physiological effects, including feelings of fear and shivering. [8] Though this had been known for many years, Tandy and Lawrence were the first people to link it to ghostly sightings.
There is a belief that infrasound can cause symptoms, including tinnitus, stress, fatigue, memory loss, attention deficit, vertigo, migraines and sleep deprivation. [ 4 ] A panel of experts commissioned by the Massachusetts Department of Environmental Protection concluded in 2012 that "there is not an association between noise from wind ...
A 2023 review article written by Bartholomew and Baloh concluded that the AHIs are an example of mass psychogenic illness, rooted in a moral panic based on the fear of the Russians or Cubans attacking the U.S.. The authors stated that Havana Syndrome is "a socially constructed catch-all category for an array of pre-existing health conditions ...
Infrasound hypersensitivity (IHS) is a collection of symptoms that appears when the person has been exposed to low-frequency or infrasound noise, usually from machinery such as a wind turbine. [1] It is sometimes called wind turbine syndrome or vibroacoustic syndrome. [ 1 ]