单词infrasound
n.: 次声
网络: 次声波；亚声；低频次声波
亚声速
亚声,次声,不可听音
次声速
Sub-sonic infrasound - inaudible to the human ear - was discovered only in 1987 and may be the most important means of communication.
亚音速的次声波（人耳是无法听见的）在1987年才被发现，这也许是大象最重要的通讯方式。
Detection of atmospheric nuclear explosions: the infrasound component of international monitoring system.
大气核爆炸探测：国际监测系统的次声部件…[中国核科技信息与经济研究院]。
The results indicate that the pentagon array of six elements is appropriate to the infrasound signal which frequency is lower.
计算结果表明五边形六元阵适用于频率较低的次声信号；
So the measurement of the precursory infrasound could become a new and more effective method of the imminent earthquake prediction.
故地震前兆次声波的测量研究，有可能发展成为临震预报中一种有效的新方法。
Those waves have frequencies in infrasound domain, the sound actually nobody knows, domain.
这些波的频率属次声域，是人类无法听见的声域。
In reality, these infrasound songs were captured in 2009, off the coast of. . . Long Island?
事实上，这些次声歌曲在2009年被捕获，地点在长岛（？注：美国纽约州东南部岛屿）附近的海岸。
Infrasound can travel farther than higher pitched sound.
次声比更高的噪声传播的远。
Using the infrasound method to predict the initial time and scale of the earthquake is effective.
利用次声波异常信号预测发震时间及震级是十分有效的。
Professor: So, that"s how elephants use infrasound.
因此，这就是大象怎样利用次声。
The infrasound is a domain of acoustics, because it can not be heard, therefore, it can not catch the people"s attention.
次声作为声学中的一个领域，长期以来未引起人们的注意；