# The Lawnmowers (Harmonization of Noise Emission Standards) Regulations 1992, Paragraph 9.4: Acoustic data


(a) shape and dimensions of measuring surface, location of microphones. Numbers of measuring points and wind direction shall be indicated in the diagram required under 9.2(a);
(b) value of
10log10SS0(see8.5);
(c) place, date and time of measurements;
(d) sound pressure levels recorded at measuring points (see 8.1.1);
(e) average sound pressure level over measuring surface (see 8.1.2);
(f) any dB corrections (see 8.6.1, 8.6.3 and 8.6.4);
(g) surface sound pressure level LpAm (see 8.4);
(h) environmental constant C (see 8.6.2);
(i) sound power level (see 8.5);
(j) directivity index and number of the measuring point at which LpAmax was recorded (see 3.6);
(k) nature of noise (see 7.3);
(l) where applicable, sound pressure levels at operator’s position (see Part 2).

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Source: https://www.legislation.gov.uk/uksi/1992/168/schedule/3/paragraph/9.4 (the official version)
Page: https://openlegislation.uk/lawnmowers-harmonization-of-noise-emission-standards-regulations-1992/schedule-3/paragraph-9.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.