Fig. 4

Comparison of the a priori SNR estimation over a short-time period between the true a priori SNR ξ (black solid line with a marker), ML a priori SNR estimate (green dashed line), \(\hat {\xi }_{\text {DD}}\) (blue solid line), \(\hat {\xi }_{\text {MDD}}\) (cyan dot solid line), \(\hat {\xi }_{\text {TSNR}}\) (magenta solid line) and \(\hat {\xi }_{\text {prop}}\) (red solid line with a marker), at 9th critical band and 10 dB SNR under different background noise: 1st row for pink noise, 2nd row for factory noise, and last row for babble noise