2.
2.1
NOISE ASSESSMENT
Introduction
2.1.1 Chapter 9 of the Hong Kong Planning Standards and Guidelines entitled "Environmental Guidelines for Planning in Hong Kong" published by the Hong Kong Government gives required standards for noise levels. These are:
Schools Dwellings
Noise Level 10 dB(A)(1 hour)
65
70
The 10 dB(A)(1 hour) is a measure of the noise occuring within а one hour period and is related to the maximum traffic flow occuring in this period.
2.1.2
The noise predictions were carried out by computer modelling adopting the methodology described in "Calculation of Road Traffic Noise", Department of the Environment, UK, 1975.
2.1.3
Where
In accordance with this method, the road sections of the IEC and tunnel approaches were segmented and the aggregated noise levels determined at the various reception points. appropriate, account was
taken of carriageway separation and corrections made for facade reflection.
2.2
2.2.1
Findings and Conclusions
The estimated predicted maximum reception points are presented in Table 2.1.
noise-levels at
the
Table 2.1 Maximum Predicted Noise Levels
Reception Point
Maximum Predicted Noise Level 10 dB(A) (1 hr)
Ground Floor Level Mid-Height
Top Floor Level
1. Pine Mansion
77.7
75.6
73.5
2. Banyan Mansion
76.0
74.7
73.0
3. Willow Mansion
73.5
72.5
71.4
4. Oak Mansion
68.6
68.4
67.9
5. Maple Mansion
71.6
71.5
71.0
6. Canossion College
70.5
71.5
72.0
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