Quote:
Originally Posted by zmoorhs  Do some reading on infrasound & infrasonics. It's quite common knowledge that infrasonic & ultrasonic weapons are in use now, but it's nothing new. Scientists, especially those working on military projects have been playing around with it for many decades. Tesla did & to a greater extent Gavreau did. http://www.hbci.com/~wenonah/history/gavreau.htm Gavreau created infrasonic weapons so powerful that they couldn't be used without infrasonic armour since they were able to shatter & break matter. Needless to say, he therefor devoted himself to developing infrasonic armour & defense.
Sound weaponary & defense systems have been spotted all over the place in actual use by military forces. Ultrasonic weapons appear to be the prefference for crowd control as certain high frequencies are powerful enough to irritate a crowd so much that it has no choice but to get away from the source of irritation. |
I dont think there is realy anything specially weapon like about those ranges.
They are just part of the bigger phenomenon of sound.
All frequencies would have certain behaviour in air.
But saying it's only those ranges are suitable as weapons seems strange.
The high frequencies as a 'crowdpleaser' has to do with frequencies within the hearable range. They have psychoacoustic effects that are realy irritating and confusing.
At the lower end of the spectrum the same theory applies as at other frequencies. If you can find the resonance freq of something you can make it resonate. If you put enough energy into the resonance the object will break.
Nothing special about it realy.
BTW.
I highly doubt the sonic resonance frequency of a human is anything near 7 Hz.
If i take a reasonable person (1.7m being the longest distance inside the body) and assume the human body is mostly water, which has a sound propagation speed of about 1430m/s then i get around 840Hz for the ground resonance of the longest distance inside a human body.
Any harmonic of this distance would yield higher frequencies, so would any shorter distance inside the body.