# The Lawnmowers (Harmonization of Noise Emission Standards) Regulations 1992, Paragraph 6.3.3: Measurements in the open air on grass


The test area must be flat and horizontal. The test area including the vertical projection of the microphone positions shall be covered in grass turf which is not wet.

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Source: https://www.legislation.gov.uk/uksi/1992/168/schedule/3/paragraph/6.3.3 (the official version)
Page: https://openlegislation.uk/lawnmowers-harmonization-of-noise-emission-standards-regulations-1992/schedule-3/paragraph-6.3.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.