From: Significance of parametric spectral ratio methods in detection and recognition of whispered speech
Condition
LP-MVDR
LPRSAC
Spectral flatness
Normal
0.12
0.3
0.26
SNR=50 dB
0.14
0.46
0.29
SNR=45 dB
–
SNR=35 dB
0.40
0.30