Israel cohen提出的一种跟踪噪声最小值算法，算法在有声段和无声段都可以更新噪声，
但是遇到噪声突然变大的情况，无法解决(A tracking noise minimum algorithm proposed by Israel Cohen, which updates noise in both the vocal and unvoiced segments,
However, when the noise suddenly increases, the situation can not be solved
A tracking noise minimum algorithm proposed by Israel Cohen, which updates noise in both the vocal and unvoiced segments,
A minimum noise tracking algorithm Israel algorithm proposed by Cohen, in the sound and silent section can update the noise
A minimum noise tracking algorithm Israel algorithm proposed by Cohen, in the sound and silent period can be updated noise
A minimum noise tracking algorithm Israel algorithm proposed by Cohen, in the sound and silent period can update noise
A minimum noise tracking algorithm Israel algorithm proposed by Cohen, in the sound and silent section)