# The Lawnmowers (Harmonization of Noise Emission Standards) Regulations 1992, Paragraph 6.4.1: Measuring surface


The measuring surface to be used for the test shall be a hemisphere. The radius of the hemisphere shall be determined by the width of cut of the lawnmower.
The radius shall be:
4m, where the width of cut of the lawnmower to be tested is no more than 1.2m
10m, where the width of cut of the lawnmower to be tested exceeds 1.2m.

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Source: https://www.legislation.gov.uk/uksi/1992/168/schedule/3/paragraph/6.4.1 (the official version)
Page: https://openlegislation.uk/lawnmowers-harmonization-of-noise-emission-standards-regulations-1992/schedule-3/paragraph-6.4.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.