Finally, the optimum weighting factor of each trace is determined with the signal amplitudes and noise covariance.
最后由信号的振幅和噪音协方差矩阵来确定每道的优化加权因子并作加权叠加。
2
All kinds of methods measuring noise have been produced and A-weighting sound level is extensively used as a kind of fundamental measure in all of the world.
And in perceptual weighting stage, auditory masking effect is used. A perceptual weighting filter is designed to filter the enhanced speech by spectral subtraction so as to remove residual noise.