TNAG-1613-FCO40-2221-Executive-Council-of-Hong-Kong-memoranda-and-minutes-of-meet-1987 — Page 239

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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))