程序主要是在原有谱减算法的基础上通过调整改进增益的系数a，b来实现谱减的改进，改进的谱减法实现了很好的语音降噪效果。-In the original program is mainly based on spectral subtraction algorithm improved by adjusting the gain of the coefficients a, b to achieve improved spectral subtraction, improved spectral subtraction to achieve a good speech noise reduction.