Abstract:
<正>1.引言次声信号的时域特征表现为电压随着时间而变化,就是时间波形,通过时间波形可以看出信号的持续时间和能量密度;而频谱表现为信号的频率的分布曲线,它将对信号的研究从时域引到频域,通过频谱
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Year: 2010
Language: Chinese
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30 Days PV: 2
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