Thread: You think your home cinema is impressive?
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Old 08-05-2005, 00:48   #21
Richard M
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Re: You think your home cinema is impressive?
The Army actually investigated this as a method of warfare because a very low frequency (<20Hz) at a high SPL can actually stop the human heart.

Quote:
Humans interact with the acoustic environment in many complex ways. The human
hearing system not only consists of the ear but also encompasses conduction and
mediation via bones, flesh, and body cavities. Acoustic energy has the ability to
profoundly influence an individualââ ¡Ãƒâ€šÃ‚¬ÃƒÂ¢Ã¢â‚¬Å¾Ã‚¢s brain waves, respiratory cycles, nervous system,
muscle function, heart rate and glandular function. As such, a benign acoustic space can
readily be turned to violence against the individual.
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