Table 4.3 Noise
Monitoring Parameters, Duration and Frequency
|
Contract No. |
Monitoring
Stations |
Parameters[2] |
Duration |
Frequency |
Measurement |
|
|
ND/2019/06 |
CP-FLN-NMS1[3] |
L10(30 min.) dB(A) L90(30 min.) dB(A) Leq(30 min.)dB(A) (as six consecutive Leq, 5min readings) |
0700-1900 hours on normal weekdays |
Once per
week |
Façade |
|
|
ND/2019/04 |
||||||
|
ND/2019/05 |
||||||
|
CP-FLN-NMS2[4] |
||||||
|
ND/2019/01 |
CP-KTN NMS2[5] |
Free-field[1] |
||||
|
CP-KTN NMS3[6] |
||||||
|
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]: Since the
distance between monitoring station and site boundary of ND/2019/03 and ND/2019/04 under EP-473/2013/A exceeds 300m, the monitoring station is not
applicable to ND/2019/03 and ND/2019/04.
[5],[6]: 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.