- 21.
3.
Measurement Procedures
3.1 Assessment Point
Noise levels shall be determined by carrying out measurements
at the assessment point. Where a
measurement is to be carried out at a
building, the assessment point shall be at a position 1 m 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
Such
Any noise measurement shall be made in terms of the A-weighted
equivalent continuous sound pressure level (L) measured with an
eq integrating sound level meter set to the "fast" response.
measurement shall be made over any 5 minute period during the CNP period
under consideration.
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
Noise measurements should not be made in the presence of fog,
rain, wind with a steady speed exceeding 5 m/s, or wind with gusts
exceeding 10 m/s.
I.D. No. NP3-RR (NP (1C))