Restricted Hours Noise Monitoring Results (Evening Time)

Station NM6 Customs' Marine Base (Block H of Government Dockyard) Rooftop

Date

Start Time

End Time

Weather

Noise level (dB(A)), 5 min

Major Construction Noise Source(s) Observed

Other Noise Source(s) Observed

Remarks

Mean Temp. (°C)

Mean Wind Speed (m/s)

Noise Meter Model / ID

Calibrator Model / ID

Leq

L10

L90

05-Feb-10

22:18

22:23

Fine

65

66

65

excavation  in process

traffic noise from nearby piers

-

17.4

<5 m/s

B&K 2238

B&K 4231

22:23

22:28

Fine

65

66

64

22:28

22:33

Fine

65

66

65

18-Feb-10

22:12

22:17

Fine

64

64

63

excavation  in process

traffic noise from nearby piers

-

9.1

<5 m/s

B&K 2238

B&K 4231

22:17

22:22

Fine

64

64

63

22:22

22:27

Fine

63

64

63

23-Feb-10

22:16

22:21

Fine

65

66

64

excavation  in process

beep noise from A/C room located at rooftop of Customs’ Marine Base, traffic noise from nearby piers

-

20.1

<5 m/s

B&K 2238

B&K 4231

22:21

22:26

Fine

65

66

63

22:26

22:31

Fine

64

65

63

Min.

63

Max.

65