Environmental Noise Level Impact Assessment of Facilities Building · 132005.1133.13

Altum Constructions
Environmental Noise Level Impact Assessment of Facilities Building, Parkridge, 75 Resort Drive, Noosa Heads   Page 11 of 16



Using the formula for patron noise LWA = 15 × log10(number of patrons) + 64 dB(A), then for the different
time periods the predicted patron noise levels would be:

        0600 to 0700 hours:     (15 × 1.48) + 64 = 86 dB(A) LWA for 30 diners and 82 dB(A) LWA for 15
                                 diners;
        0700 to 2200 hours:     (15 × 2.18) + 64 = 97 dB(A) LWA for 150 diners and 92 dB(A) LWA for 75
                                 diners;
        2200 hours to midnight: (15 × 2.0) + 64 = 94 dB(A) LWA for 100 diners and 89.5 dB(A) LWA for 50
                                 diners.


Closest Residential to East

The closest residential apartments with direct line of sight to the outdoor dining area are, at the time of
this report, still to be constructed, namely Blocks 18 to 21 inclusive. The floor level of these Blocks is
elevated at least 12 metres above the outdoor dining area, with Blocks 19 and 20 the closest, at a
separation distance of approximately 50 metres. At this elevation, and given that 75% of the outdoor
dining area is roofed, there would be line of sight to approximately 50% of the outdoor dining area and
the remaining 50% would be obscured from view by the roof. Therefore, for approximately 50% of the
outdoor dining area the roof acts as an acoustic barrier between the diners and the residential
apartment Blocks 18 to 21 inclusive.

At this separation distance (and allowing 50% protection to the outdoor dining area by the roof and
assuming 50% of the diners are under the roof and the other 50% are in the open) the above patron
noise levels would be:

        0600 to 0700 hours:           82 dB(A) LWA – 42 (distance) = 40 dB(A) LAeq,adj,T with line of sight; and
                                       82 dB(A) LWA – 42 (distance) – 8 (roof over) = 32 dB(A) LAeq,adj,T.
                                       Combined noise level = 41 dB(A) LAeq,adj,T, less 7 dB(A) for the
                                       residential balcony balustrade = 34 dB(A) LAeq,adj,T.

        0700 to 2200 hours:           92 dB(A) LWA – 42 (distance) = 50 dB(A) LAeq,adj,T with line of sight; and
                                       92 dB(A) LWA – 42 (distance) – 8 (roof over) = 42 dB(A) LAeq,adj,T.
                                       Combined noise level = 51 dB(A) LAeq,adj,T, less 7 dB(A) for the
                                       residential balcony balustrade = 44 dB(A) LAeq,adj,T.

        2200 hours to midnight: 89.5 dB(A) LWA – 42 (distance) = 47.5 dB(A) LAeq,adj,T with line of sight;
                                 and
                                 89.5 dB(A) LWA – 42 (distance) – 8 (roof over) = 39.5 dB(A) LAeq,adj,T.
                                 Combined noise level = 48 dB(A) LAeq,adj,T, less 7 dB(A) for the
                                 residential balcony balustrade = 41 dB(A) LAeq,adj,T.

For the time varying noise of patrons laughing and talking the noise limits are:

        daytime (0700 to 1800 hours):                     50 dB(A) LAeq,adj,T;
        evening (1800 to 2200 hours):                     45 dB(A) LAeq,adj,T;
        night-time (2200 to 0700 hours):                  40 dB(A) LAeq,adj,T.

The daytime and evening noise limits are complied with for the above scenarios, as is the early morning
period. However, the night-time period (2200 to midnight) is potentially exceeded by 1 dB(A). Given
that it is unlikely that there would still be 100 patrons in the outdoor dining area between 2200 hours and
midnight on a regular basis, this minor exceedance should be considered acceptable.

In addition to the above it should be noted that there will be clear plastic blinds installed around the
perimeter of the roofline for the outdoor dining area and when these curtains are closed they will assist,
to a small extent, in further reducing any potential noise impact to the closest residential.




David Moore & Associates Pty Ltd                                                Our reference: R19083/D3422/Rev.2/18.12.19