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The Lawnmowers (Harmonization of Noise Emission Standards) Regulations 1992
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- 1992 No. 168
- SCHEDULE 3
- PART 1
- Regulation 8.5
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8.5 Calculation of the sound power level LWA
The sound power level LWA of the sound source is calculated by means of the following equation:
where:
LWA = the sound power level of the source tested, expressed in dB (see 3.4);
LpAm = the surface sound pressure level, expressed in dB, as defined in 3.3;
S = the area of the measuring surface in m2, calculated in accordance with the method described in 8.3;
S0 = reference area of 1 m2;
K2 = correction term for the test area, expressed in dB. See last paragraph of 8.6.2.
Note(see 6.4.1)
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