Table 4.3 Noise Monitoring Parameters, Duration
and Frequency
|
Contract No. |
Monitoring Stations |
Parameter |
Duration |
Frequency |
Measurement |
|
ND/2019/06 |
CP-FLN-NMS1 |
L10(30 min.) dB(A) L90(30 min.) dB(A) Leq(30 min.)dB(A) (as six
consecutive Leq, 5min
readings) |
0700-1900 hrs
on normal weekdays |
Once per
week |
Façade |
|
ND/2019/05 |
CP-FLN-NMS2[3] |
||||
|
ND/2019/01 |
CP-KTN NMS2[4] |
Free-field[1] |
|||
|
CP-KTN NMS3[5] |
|||||
|
ND/2019/01 |
CP-KTN NMS5 |
||||
|
ND/2019/02 |
CP-KTN-NMS6 |
Façade |
Remarks:
[1]: Correction of +3dB (A) for Free-field
Measurement.
[2]:
A-weighted equivalent continuous sound pressure level (Leq).
It is the constant noise level which, under a given situation and time period,
contains the same acoustic energy as the actual time-varying noise level.
L10 is
the level exceeded for 10% of the time. For 10% of the time, the sound or noise
has a sound pressure level above L10.
L90 is
the level exceeded for 90% of the time. For 90% of the time, the noise level is
above this level.
[3]: Since the
distance between monitoring station and site boundary of ND/2019/03 under
EP-473/2013/A exceeds 300m. The monitoring station is not applicable to
ND/2019/03.
[4],[5]: Since the distance between monitoring station and site
boundary of ND/2019/03 under EP-468/2013/A exceeds 300m. The monitoring station
is not applicable to ND/2019/03.