When you are planning your next party and want some ghostly effects, who do you call? Infrasound. What is Infrasound? It is sound which has frequencies lower than those usually heard by humans. The normal range of human hearing goes from 20khz at the top, down to 20hz. Sound less than 20hz is better felt than heard. What are the effects of infrasound, they can range from shattering glass panes to the stunning effects of whales and ghostly haunting of buildings. For more on the effects of infrasound go here, here and here. Vic Tandy of Coventry University has been involved in the study of infrasound and the 'hauntings' of buildings. See here for one such report, another one is here. This account by Tandy best explains these ghostly effects of infrasound. Recently, researchers from the National Physical Laboratory(NPL) of England found that infrasound can cause a range of spooky effects in listeners, ranging from extreme anxiety to elation, coldness and those shivers down the spine and even the flickering of burning candles. Eyeballs are found to resonate at 18.98hz and this can result in one seeing ghostly images. See report for the study carried out by Dr Wiseman of the NPL. So it appears we won't be needing the help of the Michigan Ghost Busters in future for help in 'haunted buildings' but instead call upon the Infrasound Busters.
The 12ft pipe used to produce infrasound in the NPLstudy
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You may say I'm a dreamer but I'm not the only one
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And the world will be as one. IMAGINE:youtube::John Lennon