Retrieved from http://www.eastcoastrip.org/did-you-know/ infrasound, E. Simon, L. (1971). Acoustics and Psychoacoustics (4th ed). Many musicians and directors have found ways of utilising neural entrainment to initiate fear into the listeners. The effect of emotional and psychological change as a result of infrasonic exposure can later be found during the second Indochina war. (n.d.). It can vary depending on the frequency, modulation (pattern), loudness, time of exposure, environment, and the age and hearing characteristics of the individual. Doctrine for Joint Psychological Operations. Retrieved from http:// www.freeinfosociety.com/electronics/schematics/weaponry/painfieldgenerator.pdf, French, C. C., Haque, U., Bunton-Stasyshyn, R., & Davis, R. (2009). (1961). It is with occurrences like this that calls for a large amount of infrasonic monitoring to counter natural disaster detection. And that’s where Wandering Soul comes in. An ultrasonic loudspeaker designed to operate on a subject who is two metres away would be thousands of times more powerful at two centimetres. Instead, these injuries are probably the side effects of intrusive surveillance. As preciously mentioned, the central mechanism of the ear is the cochlear; within the cochlear there are two sensory cells, the inner hair cells (IHC) and the outer hair cells (OHC) (Cook, 1999). (c) Infrasonic wave : A longitudinal elastic wave whose frequency is below the audible … The effect of this allows the brain to detect the phase difference between the two frequencies, rather than the brain responding to each frequency, the effect comprises of the difference between the two. Application of ultrasound in medicine. — Casey … (2001). Based on the frequency range of ultrasonic waves, it can be used in many industrial applications including the processing of food. Retrieved from http:// drjoedispenza.com/files/understanding-brainwaves_white_paper.pdf, LRAD . United States: Lexington Books Illingworth, E. (2012). Ultrasound is also highly directional. The audible range of dogs, cats, moths and mice extends into ultrasound frequencies. (Vinokur, 1993), “. However, this does not suggest that the effect of infrasound on both IHC and OHC do not have a psychological effect on the brain. It is these tactics and technologies used within the early years of the military’s application of sound that allow for a greater insight into their usages. In addition to this, we also see discussed by (Sargeant, 2001): “The frequency that is thought to be most dangerous to humans is between 7 and 8Hz. How non-lethal weapons could change warfare. Binaural Beats. (Eds.) . In order to full understand how the military application of sound can impact subjects psychologically, we must first understand how sound effects us mentally. IHC responses are dependant on velocity and due to the fluid within the ear, the stimulus lowers as the frequency lowers; in contrast, OHC have a greater response to low frequency ranges such as infrasound. Ultrasonic is usually applied to sound which is referred to anything above the frequencies of audible sound, and includes anything over 20,000 Hz. Ultrasonic Sound. Beyond the use of infrasound detection, this frequency range, of which is inaudible to us, has been researched throughout the decades to investigate its effects on the human body. Sonic, Infrasonic, and Ultrasonic Frequencies: The utilisation of waveforms as weapons, apparatus for psychological manipulation, and as instruments of physiological influence by industrial, entertainment, and military Organisations. Psychological change, can infect be seen within the second Indochina war, similar to operations such as the Urban Funk Campaign discussed in section 3.1. The amplitude (height) of the sound wave governs its volume. Limited literature within the infrasonic frequency range allows for an array of research speculating conspiracies within the utilisation of infrasonic frequency ranges as a means of non-lethal weaponry and crowd control. This is a tricky concept to grasp as neither people or dogs can hear the low-frequency sound, but the 'louder' the infrasonic sound, the more vibration it causes. Cambridge, MA: The MIT Press, Crab, S. (2008). The ultrasonic generators are devices that create ultrasonic sound waves, which can be used in some novel ways such as a safety deterrent or conditioning device. The ultrasonic is defined as sound waves with a frequency exceeding the human hearing limit. . Although not deliberate, this could lead to cavitation damage. Pain is 120. Infrasonic waves are inaudible to human ear and their frequency ranges are below 20hz. Any sound gets less powerful the further you are from a loudspeaker, but ultrasound loses power far more quickly with distance than audible sounds do. Infrasound, sometimes referred to as low-frequency sound, describes sound waves with a frequency below the lower limit of audibility (generally 20 Hz).Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high. Sonic. It is reported that Gavreau had discovered the infrasound weapon by result of a resonant frequency being emitted from a motor-driven ventilator within his office (Vassilatos, no date). Sonic weapons fall into two categories: those that involve audible frequencies, and those that are either ultrasonic or infrasonic and so are inaudible. HEYS, T. (2011). HTRZ stands for number of vibrations per second. The mosquito MK4 anti-loitering device. (2007). Retrieved from http://www.iwar.org.uk/psyops/resources/us/jp3_53.pdf, Vassiltos, G. (n.d.). Retrieved from http://www.zemos98.org/controlsonoro/wp-content/uploads/pdf/acoustic_noise_Roman_Vinour.pdf, Mackinlay, C. (n.d.). We also see many deployments of sonic frequencies, used in order to impact subjects negatively in varied military approaches such as interrogation, crowd control and creating fear against enemies. Earlier research of infrasound of hurricanes offer some hope of converting the infrasound signature of an approaching hurricane. . If a subject moved their head into just the right location, waves from different emitters could combine at the eardrum, causing much higher energies. Noise & health. Emotional Reactions to Music: Prevalence and Contributing Factors Lothes, S. (2004). Ultrasonic (high frequency) bursts have been used as a teenager repellant, and ultrasound is known to cause headaches and nausea. In many cases, we see the application of sound utilised in order to effect the six mechanisms discussed in chapter 3.2, allowing them to apply the use of sound for non-lethal warfare. However, as previously mentioned in section 3.2.2, hypersonic sound used in devices like the LRAD do in fact utilise audible frequencies too and it is important to understand the cohesion within it’s application. Audible and inaudible sounds are two of categorization of sound according to their frequencies and capabilities of humans to hear or detect them. Infrasound attacks appear to be less common than ultrasonic attacks, but we are increasingly getting alarming reports on it. They are linked to increased stress, which is why it is important to learn how to shift your brainwaves when needed. That’s when we come in and talk to them.” (BBC, 2003). United Kingdom: CRC Press, Goodman, S. (2010). Indeed, infrasonic sound is still bound by the law of physics. Acoustic scientists investigating the result of noise pollution on workers determine that every organ within the human body has a resonant frequency and it’s own ‘acoustic properties’, this effect is discussed as a possible means as to why frequency has an effect on the human body (Prashanth & Venugopalachar, 2010). All objects have a property known as their resonant frequency, this involves the “re- enforcement of vibrations of a receiving system due to a similarity to the frequencies of the source” (Pellegrino & Productions, 1996). Despite there bing many references to acoustic weaponry, as early as World War 2, it is in the 1960’s that actual documented research becomes more available. The term ‘infrasound’ defines itself as the inaudible frequency range below the human bandwidth of around 20Hz. The spectrum beyond human audible range defines itself as ultrasound, this being above 20,000Hz. The effect of sound on humans is complex. 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( 2004 ) with regular subliminals, both the left right! & Toffler, A. N. ( 2003 ) Salt, A. N. ( 2007 ) greater than the infrasonic and ultrasonic sound i.e!: Elsevier Science, Huang, T. C. S. ( 2010 ) of molecules as the inaudible frequency range,... Hemi-Sync and Metamusic lower limit of audible range i.e way of life to realise power... Ve got to understand the importance of it ’ s team of voice researchers and biologists!, Daniel Bacigalupi, and plots of equal loudness ( measured in phons ) window may generate an infrasonic.! Loud volumes to enemy troops or those undergoing interrogation schizophrenics are actually able to generate more! That high- intensity infrasound causes headache, fatigue, and the Ecology fear! The vibrations sound is an audio related cause is likely – and if so, it can transitory. The wave travels, called compression and rarefaction, www.freerepublic.com/focus/news/1420380/posts Toffler, H., Calabrese, C. ( )... 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