Evaluation results. Performance of the proposed cortical features (red filled squares) and enhanced MFCC features (black open circles) on NIST SRE 2010 “extended core” database as a function of noise level, noise type, and condition. In each subplot, the noise level is shown on X axis and the EER (in percents) is on Y axis. Columns and rows of subplots belong to the same noise type and to the same condition, respectively. Note the Y -axis ranges are not the same in the subplots.