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Table 1 Normalized average of spectral subtraction and ANS spectrum errors (RMSE criteria) on test set A of Aurora 2 task

From: Autocorrelation-based noise subtraction method with smoothing, overestimation, energy, and cepstral mean and variance normalization for noisy speech recognition

Method Average of spectrum error
20 dB 15 dB 10 dB 5 dB 0 dB −5 dB
SS 332 378 488 653 982 1500
ANS 22.4 28.1 39.3 55.9 87.9 142