On page 307, Table 1, there is an error in the placement of the lines in the “Average” column. All measured values in Table 1 are correct, but the lines to the right, showing how the conclusive values “39 dB” and “32 dB” were calculated, were erroneously scaled in the final preparation, and point to wrong values in their lower end. The correct placement of the lines is shown in the corrected version in this erratum.
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