A Little Birdie - 287 Gympie Terrace - Cover Letter 190716

the volume limited after installation to a level commensurate with normal Council
and OLGR conditions as described above.

       Patrons
The calculated potential noise impact levels indicate that patrons conversing in the
outdoor area pose a risk of the criteria being exceeded during all time periods. It is
expected that during the daytime this is unlikely to be an issue, particularly given the
previous use of the tenancy. However, adjoining residents could reasonably be
expected to be more sensitive during the evening and night-time periods.
It should be noted that the calculations of potential noise from patrons is based on
the outside area at a likely maximum seating capacity, with one in two patrons
speaking simultaneously. However, patrons talking within the lower range of speech
levels, smaller groups of patrons, or fewer patrons speaking simultaneously (one in
three or one in four) will all be expected to produce significantly less noise.
The present configuration of the outdoor area limits noise management to limiting
use of the outdoor area by retaining most dining inside during the later evening
after, say, 8 pm.
Alterations to the outdoor area could be made that will significantly improve the
acoustic performance of the tenancy and allow much greater use of the site. To that
end, the following are suggested:
     1. Construct “wing” walls at the east and west extents of the outdoor dining
        area, extending from the façade wall of the building out towards Gympie
        Terrace (indicated in Figure 4 and Figure 5). These would need to be
        constructed to an acoustic barrier standard, and seal to both the ground and
        overhead cover for maximum effectiveness. To maintain visual amenity,
        these could be constructed of transparent material such as toughened glass
        or clear acrylic e.g. Perspex, provided they have a minimum surface density of
        10 kg/m2. The western side would require a door/gate if use of the access
        ramp was to be maintained. “Lift in/out” structures would even suffice,
        provided they maintained the required acoustical integrity. AND
     2. Improve the insertion loss of the overhead cover by replacing with a suitably
        massive sandwich panel or similar awning. Alternatively, a themed or
        decorative construction underneath the existing cover may be possible.




RoadPro Acoustics                                                        ABN 50 319 930 318
1060 RGreen 20160803 LR Final.doc                                              Page 7 of 10