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Determine the Acceptable Noise Level (ANL) |
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Is
the construction site located inside Designated
Area (DA)
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Type
of area containing the Noise Sensitive Receiver
(NSR) |
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Degree
to which the NSR is affected by industrial area
or major road |
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Time
period of construction work |
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Is
the duration of the Construction Noise Permit
(CNP) under application greater than 14 days
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Degree
at which the NSR is affected by noise from nearby
construction site with CNPs |
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Under
GW-TM |
Under
DA-TM |
ANL
dB(A) |
ANL
dB(A) |
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Determine the total Sound Power Level of Powered
Mechanical Equipment (PME) |
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Items of standard PME to be used |
No.
of unit |
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Item
of non-standard PME to be used |
Sound
Power Level |
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No.
of unit |
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Total
Sound Power
Level
dB(A) |
Total
Sound Power Level
dB(A) |
| Determine
the Corrected Noise Level (CNL) at the NSR |
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Distance
between the nearest NSR facade (with windows, doors
or opening) and Notional Source Position of PME
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m |
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Effect
of barrier / screening |
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Will the noise level be increased due to the confined
or reverberant nature of the immediate locality
of the construction site or the NSR |
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CNL
at nearest NSR
dB(A) |
CNL
at nearest NSR
dB(A) |
| CNL
- ANL= |
dB(A) |
dB(A) |
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If the CNL is greater than the ANL, a CNP shall
not be issued unless it is a special case under
the Technical Memorandum on Noise from Construction
Work Other Than Percussive Piling (GW-TM) and Technical
Memorandum on Noise from Construction Work in Designated
Areas (DA-TM) |
Note: All calculations above are for quick reference
only. The issuance of the Construction Noise Permit
shall be subject to the result of a thorough technical assessment
in accordance with the procedures in the relevant
Technical Memoranda. |
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