umeB1JryEm
WASHINGTON The day before yesterday afternoon, Linping a four year old girl sitting on her grandmother lap dinner, a thunder down, collapse, officials dead little girl.
Yesterday morning,http://www.healthcarehall.com/viewnews-25153.shtml, lightning Lightning Center experts Zhejiang rushed the little girl's home and the hospital, investigating the cause of death caused by lightning.
"Basically with the judge about before, is a time when sound waves caused by lightning causing human resonance, resulting in a little girl's misfortune." Lightning Protection Center, deputy director of Zhejiang Province, Zhang Weibin said.
The whole thing there are some details that need research,boutique louboutin paris, careful analysis, the provincial center, said the mine, temporarily unable to publish final conclusions.
Infrasound - sound of death
The lightning incident, caused the tragedy is a voice - infrasound.
Nature, the acoustic frequency range is very wide, the human ear can only hear the sound waves at a frequency between 20-20000Hz (Hz), frequencies below 20Hz sound waves called infrasound.
In 1948, a ship called "Wu Lange Mei Daqi," the Dutch cargo ship through the Malacca Strait,http://www.knowbook.cn/bbs/home.php?mod=space&uid=1321373, suddenly encountered a storm at sea, the ship's radio officer side keying SOS signal, side off to report: "The captain and crew dead ...... I also was going to die. "
Rescue workers rushed to find: all the crew members are dead in their positions on their bodies could not find a little scar, but each of the deceased's face is left with fear expression.
The crew is how to die? On board without any fighting,hogan outlet 2015, burning and other traces of the forensic autopsy report also showed that the deceased are all very strong, who can not find any injuries.
Later, after years of research and testing, most scientists believe that the culprit of this incident from the shipwreck is infrasound generated by the storm at sea.
Chongqing Xinhua channel reported, the evening of 1 April 2007, Chongqing pad 13 tenders Slope Construction workers team county highway, struck by lightning in the shed, five people were killed and five injured.
Later, meteorologists survey concluded - accident belongs sky direct lightning strikes cause shock effect, lightning infrasound, is the main culprit.
Why infrasound cause death?
Infrasound is a small number of vibrations per second, the human ear can not hear the sound waves. Its frequency is very low, generally in the 20Hz or less.
But this vibration frequency, the natural frequency of human organs and just very close (the natural frequency of human organs is 3 ~ 17Hz, the natural frequency of the head 8 ~ 12Hz, the natural frequency of the abdominal viscera of 4 ~ 6Hz).
Infrasound in the human body, infrasound frequency coincides with the vibration frequency of human organs similar or identical, it will cause human organs "resonance",http://bbs.28zhuan.com/home.php?mod=space&uid=17957, gives rise to dizziness, irritability, tinnitus, nausea and other symptoms.
Especially when human abdominal cavity, chest and other natural vibration frequency and external frequency infrasound consistent resonance caused more human organs,hogan interactive, the body internal organs damaged or even killed.
Lightning infrasound, usually caused by a direct lightning strikes
Hangzhou meteorological statistics, June 20, which is unfortunate little girl happened on this day, Hangzhou monitored a total of 3400 times the lightning.
Lightning in meteorology,tiffany outlet online, there are many points system, but generally would have caused major damage is the lightning directly stroke, also known as ground lightning.
This mine is very dangerous, once hit, the thermal effect can produce 6000-10000 ℃ temperature point in the local area lightning. Including the previously mentioned lightning infrasound, it is generally caused by a direct lightning strikes.
How to identify direct lightning strikes?
Hangzhou Meteorological Station forecaster said a small way: attention thunder, the lightning flash sideways in the sky, thunder is "Rumble", called high-altitude mine, the risk factor is not;
If the lightning is to go from a height deepened, thunder sounds like a "click Lala", that is, direct lightning strikes.
High-altitude mine, generally occurs in the middle of the clouds, thunder multiple reflections inside the cloud, in the explosion wave decomposition, and produce many different frequencies of sound waves, they interfere with each other, so will sound dull, rumbling sound.
The direct strike thunder "cracking la la" in popular parlance point is because this mine is deepened fight from heaven, lightning relatively close distance from us, the blast wave it produces, had a chance to evolve into an ordinary sound waves on down, it sounds like an explosion in general.
The main hazard of direct lightning strikes
Direct lightning: lightning phenomenon, lightning struck directly to the body, up to tens of thousands to hundreds of thousands of amperes of lightning current will be by the human body through the head,http://bbs.xixisd.com/showtopic-7925281.aspx, flowing into the earth. People have been hit by lightning, a serious death.
Contact voltage: when the powerful lightning current through tall objects, will produce up to tens of thousands to hundreds of thousands of volts in the tall conductor.
People do not care to touch these objects by touch voltage such attacks occur electric shock.
Flanking blitz: Lightning struck an object, if people around this object, the lightning current is close to people at the height of the head, the air breakdown,http://slabville.com/index.php/blogs/56103/249153/poytk3xmwy, and then bleed down through the body, people suffer injuries.
Step voltage: When the lightning from the cloud vent into the earth, it will produce a potential field. Potential distribution, the higher the closer the lightning point where the potential of the lower farther away from the point where the potential of lightning.
If lightning strikes, the human potential of feet stations different location,http://cgcypt.com/forum.php?mod=viewthread&tid=805754, this potential difference between the person's feet in a voltage, then the current is possible from the human one foot into the body, the flow of the other foot.
Therefore, when the lightning hit, if not find a place to escape what, you can find a piece of low-lying areas as dry as possible, squat and feet close together or standing on one foot, so that no potential difference between the legs.
June 23 each year in Hangzhou mine awareness day
Every year from June to August, Hangzhou high convective weather, wind, thunder, rain,http://zjtxhw.gotoip1.com/home.php?mod=space&uid=120286, and even hail, a little attention, it is easy to cause disaster incidents.
Last June 23, the Qiandao Lake,nike air max pas cher, a ship to harvest Yangmei Yangmei Island,http://bbs.cranebbs.com/home.php?mod=space&uid=696344, hang the ship was struck by lightning, killing three people dead and four injured, one of the worst in history, Hangzhou lightning strike.
In order to strengthen mine disaster reduction, enhance social awareness mine disaster reduction, to reduce losses caused by lightning, and starting this year, Hangzhou decided each year "6? 23" as a mine awareness day, carried out the mine safety awareness. Reporter Gu Yi
