Paragraph 6.3.2 Measurements in the open air on artificial flooring

The test area must be flat and horizontal. The test area, including the vertical projection of the microphone positions, shall be of concrete or non-porous asphalt covered by an artificial flooring in accordance with Annex A of this Schedule, the centre of which coincides with the geometric centre of the hemisphere mentioned in point 6.4 and the corners of which are aimed at the vertical axes of the microphone positions 2, 4, 6 and 8.

If the wheels of the lawnmower could cause a compression of the artificial flooring of more than 1 cm the wheels shall be placed on supports so that they are level with the artificial flooring before compression. The supports shall be made in such a way that they do not influence the measurement results.