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Downwinder Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Sep-26-09 12:14 PM
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Tegucigalpa, City of Fury
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Judi Lynn Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Sep-26-09 02:21 PM
Response to Original message
1. Also, from your link: Micheletti’s newest U.S./Israeli toy
Micheletti’s newest U.S./Israeli toy
September 25, 2009 · 3 Comments
Photo Confirms the Use of Long Range Acoustic Devices (LRAD) by Micheletti’s Troops, Against Zelaya

By Jean-Guy Allard

Translation: Machetera

http://machetera.files.wordpress.com.nyud.net:8090/2009/09/artefacto_sonoro.jpg

Shock troops for the Micheletti regime in Honduras have used Long Range Acoustic Devices (LRADs), which can cause permanent hearing damage and other trauma, against the Brazilian embassy in Tegucigalpa where President Manuel Zelaya is.

This is confirmed by a picture taken by a photographer from the resistance, during the events which took place in the embassy’s surroundings this week. The photo reveals the presence of an LRAD, manufactured in the United States, which is capable of emitting an acoustic beam – an obnoxious sound similar to that of a car alarm but quite a bit more intense – which can cause serious damage to the hearing of the people toward which it is pointed.

At 100 meters, according to experts, reception of the LRAD beam can be extremely painful. At full capacity, the LRAD emits a 150 decibel sound wave. In comparison, the Concorde supersonic jet, emitted 110 decibel sound waves when traveling at full speed.

LRAD weapons have been frequently used against native populations by U.S. occupation troops in Iraq and Afghanistan.

According to a denunciation issued by President Zelaya, these weapons are designed to cause a state of nervousness and anxiety and were delivered to the Honduran Army by Israelis.

On Thursday, while stating that there are around a hundred supporters at the embassy with him, he added that they have been subjected to “bombardments with chemical products and ultrasound waves that provoke illness and make people very nervous.”

U.S. experts say that any sound volume greater than 90 decibels cause permanent damage. The LRAD even provokes temporary vision loss, according to researchers.

http://machetera.wordpress.com/2009/09/25/michelettis-newest-u-s-israeli-toy/
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Downwinder Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Sep-26-09 02:30 PM
Response to Reply #1
2. Judi from the comments on your link:
Edited on Sat Sep-26-09 02:31 PM by Downwinder
Readers should keep in mind that when comparing decibel levels that decibels are a LOGARITHMIC scale, not an arithmetic one.

Therefore, this weapon producing a sound of 150 decibels is NOT approximately 30% louder than a Concorde jet. It is more than 8192 TIMES as loud!!

This relationship can be understood by referring to the “Merits” sub-section of the attached wiki on decibels.

http://en.wikipedia.org/wiki/Decibel

As that section describes, an increase of just 3 decibels denotes a DOUBLING of intensity and power of the signal.

In other words a difference of just 6 decibels equals a signal 4 times as powerful, a difference of 9 decibels equals a signal 8 times as strong, a difference of 12 decibels equals a signal 16 times as strong, a difference of 15 decibels equals a signal 32 times as strong, a difference of 18 decibels equals a signal 64 times as strong, a difference of 21 decibels equals a signal 128 times as strong, a difference of 24 decibels equals a signal 256 times as strong, a difference of 27 decibels equals a signal 512 times as strong, a difference of 30 decibels equals a signal 1024 times as strong, a difference of 33 decibels equals a signal 2048 times as strong, a difference of 36 decibels equals a signal 4096 times as strong, and a difference of 39 decibels equals a signal 8192 times as strong!

Because the difference here between a Concorde jet and these weapons is approximately 39 decibels (110 vs. 140), these weapons produce a sound and an intensity 8192 times more powerful than a Concorde jet!

Those familiar with physics know that this logartithmic relationship is closely related to the inverse square law.

http://en.wikipedia.org/wiki/Inverse-square_law
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Judi Lynn Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Sep-26-09 03:14 PM
Response to Reply #2
3. Was completely unaware of this information. Thanks for clarifying the astonishing difference. n/t
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