为提高鼾声信号的信噪比，提出了一种传统谱减法和维纳滤波法相结合的睡眠 鼾声信号预处理方法． 首先利用传统谱减法对带噪鼾声信号进行初步增强，使用子空间投 影法将带噪鼾声投影到噪声和纯净信号两个子空间并得到信噪比，再由信噪比得到维纳 滤波器的传输函数，谱减法处理后的鼾声信号通过该滤波器后会进一步降低噪声． 对叠加 白噪声的鼾声信号的仿真结果表明，文中方法可获得高于谱减法和维纳滤波法单独使用 时的信噪比，降噪效果优于传统谱减法和维纳滤波法． 

 A method to improve the signalto-noise ratio (SNＲ) of snoring sound is proposed in combination with the traditional spectral subtraction and Wiener filter in this study． Firstly， the noisy snoring signals are slightly enhanced by traditional spectral subtraction by projecting the noisy snoring to noise space and signal space by a method of subspace projection so that the SNＲ is obtained． Then a transfer function of Wiener filter from SNＲ is obtained． Finally，when the snoring sound processed by traditional spectral subtraction is filtered by the Wiener filter， the noise in snoring sound can be further reduced． The results of the simulation of snoring sound with additive white noise show that the method used in the study gets a higher SNＲ than that by the traditional subtraction or Wiener filter． It is proved that the method can do better than the one of traditional subtraction or Wiener filter in noise reduction．