噪声谱估计+谱减法，主要用于对比不同噪声谱估计算法的性能，包括Martin s minimum tracking algorithm，Minimum controlled recursive average algorithm (Cohen) ，variant of Minimum controlled recursive average algorithm ，improved Minimum controlled recursive average algorithm (Cohen)，continuous spectral minimum tracking (Doblinger)，weighted spectral average (Hirsch & Ehrilcher)，connected frequency regions (Sorensen & Andersen)。详见里面readme.txt-Ppls spectral subtraction noise spectrum estimation, mainly used to compare the performance of different noise spectrum estimation algorithms, including Martin' s minimum tracking algorithm, Minimum controlled recursive average algorithm (Cohen), variant of Minimum controlled recursive average algorithm, improved Minimum controlled recursive average algorithm (Cohen ), continuous spectral minimum tracking (Doblinger), weighted spectral average (Hirsch &　Ehrilcher), connected frequency regions (Sorensen &　Andersen). See readme.txt inside