A look at the ways animals use electromagnetism , luminescence and infrasonic as well as ultrasonic waves -照顾动物福利拯救被遗弃动物接收弃养动物并安排领养提供住院医疗
2.
An infrasound detecting software was developed in visual c + + . it is a real - time infrasonic data acquisition and analysis program of 3 - point array 最后用visualc开发一套次声波探测系统软件，实现3点阵次声信号的实时数据采集和分析。
3.
Secondly an infrasonic array was constructed . the array is made up of three detectors with about 1 kilometer distance between each other . the three detectors are connected with telephone line 其次构建次声阵列，用三个相距约一公里的次声探头构成次声三元接收阵，它们之间用电话线传输数据，合理地布置各阵元的位置和方位，三路信号通过采集卡上的不同通道号输入计算机。
4.
The program includes the infrasonic signal data acquisition of three channels , 3 - d dynamic spectrum analysis , correlation analysis of 3 channel infrasonic signals , the calculation of wave direction , the wave speed , the spectrum analysis at any length and a real - time infrasonic gravity wave pressure - time ( p - t ) curve 本程序支持3路次声波传感器信号的数据采集、动态谱分析及次声信号的相关分析、能计算波源的方位角、波速以及任意时间段的谱分析，并实时给出次声重力波的压力?时间曲线(即p ? t曲线) 。
5.
Hi this thesis , the technique of detector array is used to obtain the location of anomalous infrasound , it is the basic of the study of prediction of earthquake . to derive useful information by using spectrum analysis on infrasonic signal . then combing with other methods a forecast could be made 本课题主要是利用数字技术，采用用传感器阵列计算异常次声波波源的方位，这是今后预测震中位置研究的前提；并对次声信号进行频谱分析，提取有用的关于临震次声方面的信息，再结合其他的预报方法，作出准确的地震预报。
