中文说明：
短时频分析，程序中通过加窗截取信号，分析其时频关系
English Description：
Short time frequency analysis, the program intercepts the signal by adding a window and analyzes its time-frequency relationship
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中文说明：
短时频分析，程序中通过加窗截取信号，分析其时频关系
English Description：
Short time frequency analysis, the program intercepts the signal by adding a window and analyzes its time-frequency relationship