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本文提出了应用小型数字计算机和快速傅氏变换作次声信号动态频谱的分析方法,实验证明这种方法行之有效,且容易实施,从而克服了模拟分析器难以克服的困难。本文介绍数字化频谱分析的一般原理,着重讨论记录在纸上的次声信号的采样和分析方面的有关问题,给出了用FORTRAN语言编写的动态谱分析计算程序和绘图程序,和一个实际例子的分析结果。
In this paper, we propose a small digital computer and fast Fourier transform to analyze the dynamic spectrum of infrasonic signals. Experiments prove that this method is effective and easy to implement, which overcomes the difficulties that the analog analyzer can not overcome. This article describes the general principles of digital spectrum analysis, focusing on the sampling and analysis of infrasonic signals recorded on paper, and gives the dynamic spectral analysis program and plotting program written in FORTRAN, as well as a practical example of Analysis results.