It operates on the basis of particle acceleration techniques discovered by American scientists in the early 1980s.
它的工作原理是美国科学家在20世纪80年代早期发现的粒子加速技术。
英语百科
Particle acceleration
In a compressible sound transmission medium - mainly air - air particles get an accelerated motion: the particle acceleration or sound acceleration with the symbol a in metre/second. In acoustics or physics, acceleration (symbol: a) is defined as the rate of change (or time derivative) of velocity. It is thus a vector quantity with dimension length/time. In SI units, this is m/s.