3.
Measurement Procedures
3.1 Assessment Point
Noise
Where a measurement
levels shall be determined by carrying out measurements at the
assessment point.
is to be carried out at a
building, the assessment point shall be at a position 1m from the
exterior of the building facade, at a particular point considered
appropriate by the Authority. Where a measurement is to be made of
noise being received at a place other than a building, the assessment point shall be at a position 1.2m above the ground, at a particular point considered appropriate by the Authority.
3.2 Noise Units and Descriptors
Noise measurement shall generally be made in terms of either the
equivalent continuous sound pressure level (Leq), measured over any 5 minute period with an integrating sound level meter, or in terms of the
maximum noise level. Measurements shall be made in units of the
A-weighted decibel with the sound level meter set to "fast" response.
3.3 Rounding of Noise Levels
All noise measurements shall be rounded to the nearest whole dB(A), with values of 0.5 or more being rounded upwards.
3.4 Weather Conditions
rain,
Noise measurements should not be made in the presence of fog, wind with a steady speed exceeding 5 m/s, or wind with gusts exceeding
10 m/s.
I.D.No. NP11-RR (1) [NP2C]