Part 14 Indication of the guaranteed sound power levelF1
United Kingdom
The indication of the guaranteed sound power level must consist of the single number of the guaranteed sound power in dB, the sign L WA and a pictogram taking the following form:
If the indication is reduced according to the size of the equipment the proportions given in the above drawing must be respected. However, the vertical dimension of the indication should, if possible, not be less than 20 mm.