killer bass

[gazzamongo]

don't try this at home kids

http://www.borderlands.com/archives/arch/gavreaus.htm

[sreten]

A rather over the top and inaccurate (fantasy)
description of a well known phenomenon,

sreten.

[Solid Snake]

The article often describes infrasound as being over 20 cycles a second. Also I have a hard time believing 2 watts of energy can shake the walls of a building regardless of how it is expended.

Here is a segment from another article about this subject:

Further experimentation led him to manufacture devices which were constructed with these precise capabilities. One such device, a 24m organ pipe, was capable of generating a frequency of 7Hz, which was felt, rather than heard. Interestingly, infrasound had particularly volatile effects on humans when rated at 7Hz, as this corresponds precisely to the frequency of alpha waves in the brain. This frequency, when transposed to stroboscopic light can induce epileptic fits, or seizures, and is commonly known as the "Flicker Effect". The lethal effects of infrasound were amply demonstrated, when Gavreau's colleague, R. Levavasseur, constructed a scaled up version of a police whistle. The 6ft long device, known as the Levavasseur "Whistle", was powered by compressed air at a rate of more than~20 litres per second. The unfortunate assistants who were in the vicinity of the device when it was first operated were bombarded by massive infrasound frequencies, which were reputed to have caused internal hemorrhaging to both men, who later died in hospital, and Levavasseur became a lifelong invalid. Gavreau was devastated by this, the first documented case of death by infrasound.

[mikee12345]

alot of description but not actual facts :-)

cool though

i remember when i was a kid there was a movie on tv about the nazis inventing an audio weapon,it was a BIGGLES movie perhaps

[phase_accurate]

Also I have a hard time believing 2 watts of energy can shake the walls of a building regardless of how it is expended.

Agreed, the whole article is not that good. But 2 watts of sound power at sub bass frequencies definitely WILL shake a house.

Regards

P.S.: 2 watts of acoustic energy = 115 dB spl (re 20 uPa) @ half-space radiation @ 1 meter.

[mikee12345]

Tom danley has talked of using low frequency horns ,like <15hz outside. I got the idea that they made a wall wiggle

[Mudge]

Originally posted by mikee12345
alot of description but not actual facts :-)

cool though

i remember when i was a kid there was a movie on tv about the nazis inventing an audio weapon,it was a BIGGLES movie perhaps

Yeah, it was! Sad person I am, I wondered how they got the cone that rigid in the 1910s