Daytime Noise Monitoring Results -- Normal weekday

Station M3, Kwan Yick building(*)

Date

Start Time

End Time

Weather

Noise level (dB(A)), 30 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-12

10:22

10:52

Fine

67.4

68.9

66.2

-

Traffic Noise

-

20

0.5

RION- NL31 (S/N 00603867)

RION - NC73 (S/N 10997142)

13-Dec-12

14:22

14:52

Sunny

67.0

68.3

65.6

-

Traffic Noise

-

20

0.5

RION- NL31 (S/N 00603868)

RION - NC73 (S/N 10997143)

19-Dec-12

10:24

10:54

Cloudy

66.9

68.2

65.5

-

Traffic Noise

-

19

0.5

RION- NL31 (S/N 00603868)

RION - NC73 (S/N 10997143)

24-Dec-12

16:22

16:52

Sunny

67.2

68.7

65.9

-

Traffic Noise

-

19

0.5

RION- NL31 (S/N 00603869)

RION - NC73 (S/N 10997144)

Min.

66.9

Max.

67.4

Remark: (*): The data were provided by Contract No. DC/2007/23. Calibration certificates for the noise meter(s)

and calibrator(s) used were included in the corresponding Monthly EM&A Report for this Contract

Station M5, Chuk Lam Ming Tong

Date

Start Time

End Time

Weather

Noise level (dB(A)), 30 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

04-Dec-12

14:46

15:16

Fine

61.4

64.1

55.8

Operation of excavator

Road traffic noise

N.A

17.3

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

10-Dec-12

13:34

14:04

Fine

63.7

66.4

57.3

Operation of excavator

Road traffic noise

N.A

18.3

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

19-Dec-12

13:34

14:04

Fine

64.6

66.8

59.3

works in noise enclosure

Road traffic noise

N.A

15.1

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

27-Dec-12

15:17

15:47

Fine

63.1

65.6

60.0

works in noise enclosure

Road traffic noise

N.A

18.6

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

Min.

61.4

Max.

64.6

Station M6a, Aegean Terrace

Date

Start Time

End Time

Weather

Noise level (dB(A)), 30 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

03-Dec-12

10:59

11:29

Fine

54.4

56.9

48.8

Rock out

N.A

Free-field measurement, +3dB correction.

17.1

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

13-Dec-12

10:19

10:49

Fine

59.7

62.4

50.0

operatorion of excavator

N.A

Free-field measurement, +3dB correction.

18.9

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

19-Dec-12

10:38

11:08

Fine

56.5

58.5

49.8

operatorion of excavator

N.A

Free-field measurement, +3dB correction.

15.1

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

27-Dec-12

14:28

14:58

Fine

59.3

61.6

54.2

Rock out

N.A

Free-field measurement, +3dB correction.

18.6

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

Min.

54.4

Max.

59.7

Remark: Free-field measurement, +3dB correction.

Station M7a, Wah Ming House

Date

Start Time

End Time

Weather

Noise level (dB(A)), 30 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

03-Dec-12

09:45

10:15

Fine

63.6

64.8

60.9

No major construction works

N.A

N.A

17.1

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

13-Dec-12

09:14

09:44

Fine

60.7

62.1

58.1

No major construction works

N.A

N.A

18.9

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

19-Dec-12

09:11

09:41

Fine

79.1

83.1

61.0

No major construction works

operatorion of breaker

N.A

15.1

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

24-Dec-12

09:29

09:59

Fine

67.6

70.5

60.6

No major construction works

operatorion of breaker

N.A

13.3

<5

B&K 2238   S/N : 2381580

B&K 4231  S/N: 3003246

Min.

60.7

Max.

79.1