# The Lawnmowers (Harmonization of Noise Emission Standards) Regulations 1992, Paragraph 6.1.2: Purpose of the measurement


The cutting device shall be adjusted to a height of 3 cm. If for technical reasons this is not possible, the cutting device shall be adjusted as close as possible to a height of 3 cm. The grass in the test area shall be mown with this cutting device setting before any sound measurement is taken where tests are made under 6.3.3. below.
For the sound measurement, all grass shall be removed from the lawnmower and the grass collector shall be empty.

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Source: https://www.legislation.gov.uk/uksi/1992/168/schedule/3/paragraph/6.1.2 (the official version)
Page: https://openlegislation.uk/lawnmowers-harmonization-of-noise-emission-standards-regulations-1992/schedule-3/paragraph-6.1.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.