# The Lawnmowers (Harmonization of Noise Emission Standards) Regulations 1992, Paragraph 1.2: Materials


The artificial flooring is composed of a cover of absorptive material of which the absorption coefficients α, measured in accordance with ISO 354 first edition, 1985-02-01, are within the limits given in the following table:
Frequency/Hz
125
250
500
1000
2000
4000
α minimum
0.00
0.20
0.40
0.60
0.70
0.80
α maximum
0.20
0.40
0.60
0.80
0.90
1.00

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Source: https://www.legislation.gov.uk/uksi/1992/168/schedule/3/paragraph/1.2 (the official version)
Page: https://openlegislation.uk/lawnmowers-harmonization-of-noise-emission-standards-regulations-1992/schedule-3/paragraph-1.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.