MCU16/0079 Appendix F - Environmental Noise Imact Assessment

5.0       PREDICTED NOISE IMPACTS

5.1      Onsite Activity Noise Impact Predictions
All noise source levels used in the assessment have been collected from similar assessments. All
“Acoustic Quality Objective” noise levels have been corrected for impulsiveness or tonality as per
Australian Standard AS 1055:1997 – “Acoustics-Description and measurement of environmental
noise”.

The following noise source levels would typically occur as part of the proposed alterations and
additions to the RSL and have been assessed within this report.

                                                                     Distance                  Event Duration Noise Level, SPL dB(A)
Activity/Noise Source
                                                                    To Source                   Leq             L10              L01
Car door closures                                                       1m                      75*             77*              83*
Car bypass                                                              1m                      68              70               73
People talking outside                                                  1m                      58              60               62
Subdued patrons at outdoor terrace / balconies                          1m                      65              72               75
Boisterous patrons at outdoor terrace / balconies                       1m                      75              80               83
Dining at enclosed alfresco lounge                                      1m                      70              76               80
Gaming machines inside gaming room extension                            3m                     80**            83**             84**
       * Denotes + 5 dB correction for impulsiveness in accordance with AS1055.   ** Denotes + 5 dB correction for tonality in accordance with AS1055.



  Table 6: Typical noise source levels associated with the proposed RSL alterations and additions.

For the LAeq levels we have presented both the adjusted 15 minute duration and also the adjusted one
hour duration. For assessment of the “Background Creep” criterion we have adopted the LAeq 15 minute
duration levels.

With regards to the LA10 1hr and LA01 1hr levels, in many cases, particularly during the night-time period,
noise events such as car door closures may not register as LA10 or LA01 levels if the events do not occur
for 10% or 1% of the time period respectively. For example, a 1 second event would have to occur
360 times during a one hour period to register as an L A10, and 36 times during a one hour period to
register as an LA01 as these noise descriptors are statistically defined. If the events do not occur for the
minimum number of iterations (or time period) we have presented the results as “N/A” in Table 7.

Based upon the location of the proposed new onsite activities in relation to the nearest offsite noise
sensitive receivers (building façades and inside rooms with windows open), we predict the following
noise impact levels as presented in Table 7.

For the receivers across the river we have assumed the typical minus 6 dB per doubling of distance
noise reduction to the nearest edge of the river and no distance attenuation over the river given that
water is typical a hard reflective surface. Although there would be some noise reduction due to
distance over the river, we have adopted a conservative approach for the purposes of this assessment.

The predicted levels assume that the recommended treatments detailed in Section 6 are incorporated
into the development.




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