次声(Infrasound)是频率低于20Hz的声音。次声学是研究次声波在媒质中的产生、传播和接收及其效应和应用的科学。自然界和人类活动中广泛存在着次声波,人们正是通过次声波引发的破坏现象逐步认识它的神奇威力的包括1883年,印尼的克拉托火山大爆发,巨大的喷发激起强大的次声波,它绕了地球3周,在远离火山几万千米的观测站测到了这次次声波。
n. infrasound
misc. infra-audible sound ; infrasonic sound ; subsonic sound
通古斯爆炸包含了地震波和次声扰乱,被世界各地记录下来。
The Tunguska event included seismic waves and infrasonic disturbances that were recorded around the world.
次声的作用机理是生物共振,次声应用于生物医学,前景将会十分广阔。
Being inaudible and with a mechanism of bio-resonance, infrasound has a brilliant perspective when applied to biomedicine.
电话响了3次后我听到了咔嗒一声响,然后是她的录音留言。
The telephone rang three times before I heard a click and then her recorded voice.
So in one of them Joshua's warriors seem to march silently around the city seven times.
在其中一个故事里,约书亚的战士们,不出一声地绕城七次。
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