Experimental procedure, shown for the noise (NG), silence (SG) and control (CG) groups, along with the number of participants (n).

<p>“Silence” denotes testing with interrupted sentences with silent intervals, and “noise” denotes testing with interrupted sentences that are combined with filler noise bursts. The CG did not receive training; they were only tested with the baseline measurements at two different times, with an in-between time comparable to that of the training duration.