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easy infrasound acoustic source

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Uploaded on Jul 7, 2010

note: the human ear senses acoustic pressure waves. pressure waves move the eardrum and humans sense this motion. we call this hearing. humans are most sensitive to acoustic ( sound ) waves in the 300hz to 3000hz frequency range, but can sense acoustic pressure from one HZ to well above 20,000hz if the pressure wave is strong enough to move the eardrum sufficiently for a person to sense it. my infrasound videos easily demonstrate the ability in humans to " hear " infrasound. making the claim that humans only hear 300hz to 3000hz acoustic waves is an oversimplification of the facts of human hearing. the same can be said about many aspects of sound reproducers ( dynamic microphone element in this case ) as well, as I easily prove in this video and the follow up video.

this video shows you how to build a simple and effective , low level, infrasound signal source / transducer. it used easy to find parts and the basic premise can be easily changed for your own specific needs. this is great for inexpensive development of infrasound microphones / sensors and for low cost general infrasound experimental work. hope it helps you in the interesting world of infrasound . please see my other infrasound videos for more info and applications related to infrasound.

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