Fig. 6

Comparison of the residual noise after BWA filtering (a). Original artifact component (b). Residual noise after LMS-updated AAC (c). Residual noise after exponential non-negative LMS (eN ²LMS)-updated AAC (d). Residual noise after SReN ²LMS-updated AAC (e). Residual noise after SEeN ²LMS-updated AAC (f). Residual noise after SSeN ²LMS-updated AAC (g). Residual noise after normalized non-negative LMS (N ³LMS)-updated AAC (h). Residual noise after SRN ³LMS-updated AAC (i). Residual noise after SEN ³LMS-updated AAC, and (j). Residual noise after SSN ³LMS-updated AAC. (The x-axis is the number of samples and the y-axis is the residual noise amplitude in mV)