A Review of Published Research on Low Frequency Noise and its Effects" (PDF). Defra.gov.uk. Archived from the original (PDF) on 20 September 2008 . Retrieved 11 January 2022. Jürgen Altmann of the Technical University of Dortmund, an expert on sonic weapons, has said that there is no reliable evidence for nausea and vomiting caused by infrasound. [48] Direct measurement of the endocochlear potential by Salt et al. ( 2013) revealed the potential chemical mechanisms involved with infrasound effects. Knowing (1) the vestibular and tympanic scala contain fluids with typical extracellular concentrations (high in sodium) while the interfacing space (the endolymph) contains a high concentration of potassium, and (2) this differential concentration of ions, analogous to the phenomenon of the plasma membrane of a single cell, results in a potential difference of about 80 mV, they injected isotonic potassium chloride into the cochlear apex of guinea pigs. Application of only 5 cycles of 0.3 Hz but not sustained pressure to the external canal increased concentrations of potassium that were derived from pulses of endolymph driven from the sinus into the endolymphatic sac (Salt and Hullar 2010).

Brooke-Wavell K, Mansfield NJ (2009) Risks and benefits of whole body vibration training in older people. Age Aging 38:255–257 For reference, the pressure wave from an explosive material, such as the classic trinitrotoluene (TNT), displays a denotation velocity between 1.8 × 10 3 and 8 × 10 3 m s −1. With an air density of 1.3 kg m −3 and the square of the slower velocity, the pressure within the volume of a 70-kg human being would be between 10 and 100 MPa or about 1,000 times larger than static barometric pressure. When present as a brief burst, the pressure is sufficient to exceed the intercellular cohesive forces between cells. The remaining force is translated into the rapid motion of separation.Frey AH (1962) Human auditory systems response to modulated electromagnetic energy. J Appl Physiol 17(4):689–692 Many simple oscillator circuits have already been discussed here at Bright Hub, so you may choose any one of them to generate and feed the specified frequency of around 15 Hz to the above amplifier inputs. The information regarding various oscillator circuits are provided at the end of this article. In September 2009, London student Tom Reid died of sudden arrhythmic death syndrome (SADS) after complaining that "loud bass notes" were "getting to his heart". The inquest recorded a verdict of natural causes, although some experts commented that the bass could have acted as a trigger. [50]

Nishida K, Kobayashi N, Fukao Y (2000) Resonant oscillations between the solid earth and the atmosphere. Science 287:2233–2246 Human singers: some vocalists, including Tim Storms, can produce notes in the infrasound range. [30]

a b "Sounds like terror in the air". The Sydney Morning Herald. 9 September 2003 . Retrieved 12 March 2022. One of the fundamental premises of the physical sciences is that structure dictates function. Small changes in the structure of molecules such as the substitution of a phosphate or a hydrogen ion can markedly affect the molecule’s function and change the concentration required for its biochemical effectiveness. Large molecules have the capacity to be multifunctional depending upon the local chemical context. Phenomena manifested as waves, such as acoustic pressures or electromagnetic fields, also display potent configurations except they are expressed as temporal rather than spatial patterns. Pure sine waves or simple time-varying patterns are found less frequently in the environment than complex acoustic and electromagnetic patterns that have the potential to mediate information between the environment and cells at very low levels of intensities. Relying on only the average intensity overtime for these sources (such as infrasound) as indicators of their importance is about as useful as only measuring the loudness of a conversation to discern its syntactic content and meaningfulness. Matterhorn". 13 January 2008. Archived from the original on 13 January 2008 . Retrieved 12 March 2022.