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
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... infra red 红外线的(对红外辐射... infra sound 次声 infra-red spectrometry 红外线光谱测定法...
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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.
本文设计了专门用于检测次声武器各项性能的次声波信号采集系统和传输特性分析系统。
In this paper, the signal collection system and analytic system of transmission characteristic of infrasound are designed, which are used for testing the performance of infrasound.
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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