Restricted Hours Noise Monitoring Results -- Night time

Station M5a, Chuk Lam Ming Tong

Date

Start Time

End Time

Weather

Noise level (dB(A)), 5 min

Major Construction Noise Source(s) Observed

Other Noise Source(s) Observed

Remarks

Temp. (°C)

Wind Speed (m/s)

Noise Meter Model / ID

Calibrator Model / ID

Leq

L10

L90

07-Dec-11

23:00

23:15

Cloudy

67

60

52

Operation of excavator and loading

Traffic noise at San Wan Drive and ideal cement truck parking near the football playground

N.A

22.3

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2385180

21-Dec-11

23:00

23:15

Fine

61

60

52

Works inside noise enclosure

Traffic noise at San Wan Drive and helicopter fly over head

N.A

19.5

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2656516

Min.

61

Max.

67