suijixinhao

代码说明：

  给定一个音频范围内的模拟强噪声随机信号（强噪声+周期信号），将信号从强噪声中提取出来，并计算原信号及提取信号的均值、平均功率、方差、频谱及功率谱密度、互相关等 并附带图形(Given within the scope of an audio simulation of strong noise random signal (noise+ periodic signal), the signal from strong noise in the extracted and calculated signals and extract the original signal of the average, average, variance, spectrum and power spectral density , such as inter-related and incidental graphics)