It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
by Slap Nuts:
IS this the BIBLE to you guys? IT is NOT PEER REVIEWED... HENCE IT CANNOT BE CITED OR TRUSTED FOR INFORMATION.
Originally posted by zappafan1
On the other hand, it is NOT where one would look if his/her only goal was to justify their pre-drawn conclusions, or to provide validity to something they want so desperately to be true.
Things that go BOOM in the night!
Before proceeding to the acoustical data, let me explain a little something about explosives and how people perceive them.
I work in special effects. In films, great use is made of low velocity explosives such as untamped black powder and ANFO because they are low velocity explosives. With a great whoosh and roar they belch forth with fire and smoke in a manner that has caused folks to drop their popcorn in matinees ever since sound came in.
Movies have conditioned people to expect a certain look and sound to explosions, all based on very low velocity explosives. In a stunning ironic twist, moviegoers seem to perceive the slower explosions as more powerful.
Demolition experts will tell you that high brissive or high velocity explosives actually are more powerful, as they build up a powerful shock wave. However, except for actually collapsing a structure, such explosives are unsuitable for film. The blast is over so quickly it can be missed while the film is moving between one frame and the next. There is very little visible smoke and flash, and the "crack" of a C-4 cutter charge is downright disappointing to hear.
Thus, the average person's awareness of what an explosion is supposed to look and sound like is based on the movies and low velocity explosives only. In not knowing what high velocity explosives sound like or feel like (as the shock wave moves through the earth), many people might not understand what they have heard or felt on April 19th.
Originally posted by LaBTop
I hope we can start a discussion here at last about the true sound effects of cutter charges, be it C-4 or Thermite/Thermate cutter charges.
I'm convinced you could not hear them in the roar of the collapsing WTC buildings.
But you could feel them passing by in the soil. As was registered by the movements of a camera on a tripod I once posted here. Which can be heard and seen in the 9/11 Eyewitness video at the same time.
Originally posted by LaBTop
More appropriate thread, agreed :
I reposted it here :
Originally posted by HowardRoark
From my own first hand experience in witnessing 7 buildings demolished by “implosion.” I can tell you that you can definitely hear – and feel – the charges going off.