Strutt|Criteria|Ratings|Absorption|Alpha_W calculates the weighted absorption `alpha_W` of the current row on the selected spreadsheet and inserts it into Column D of the current row.
The rating also includes the shape indicators L, M, H indicating an absorption peak at 250 Hz (L); 500 Hz or 1 kHz (M); 2kHz or 4kHz (H)
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