为防范恐怖分子劫持飞机,制造类似“9.11”事件,美国研究人员已经开发出一种能对试图劫持飞机的恐怖分子发射“声波子弹”的武器。空中警察像使用普通枪支一样对劫机者发射强大的声波脉冲,使劫机者暂时不能动弹,从而保护飞行的安全。这种声波枪的实验室样品有一个一米长的聚合物合成枪管,直径4厘米。枪管里 To prevent terrorists from hijacking planes and creating “9.11” incidents, U.S. researchers have developed a weapon capable of launching “acoustic bullets” against terrorists trying to hijack aircraft. Like the use of ordinary firearms, the air police launched powerful acoustic pulses on hijackers, making the hijackers temporarily unable to move and thus protecting the flight safety. The laboratory sample of this sonic gun has a one-meter long synthetic polymer barrel of 4 cm in diameter. In the barrel