Reference Document - Acoustic Assessment 132007.2446.05

Flashpackers Noosa
Environmental Noise Level Impact Assessment for Proposed Addition of Second Floor to Block C and
Associated Increase to Bed Numbers for Flashpackers, 102 and 106 Pacific Avenue, Sunshine Beach           Page 16 of 29



Roofed Communal Area

The roofed communal area is adjacent to Pacific Avenue and would have a capacity for up to
approximately 15 to 20 guests and has a perimeter acoustic barrier 1.8 metres high. At the closest
adjoining residence, which is to the north-west, the noise level of 20 guests laughing and talking (64 +
15 x log1020 = 83.5 = 84 dB(A) LWAeq,adj,T) would be:

    •    84 dB(A) LWAeq,adj,T – 35 (22m distance) – 8 (acoustic barrier) = 41 dB(A) LAeq,adj,T.

For up to 20 guests in the roofed communal area adjacent to Pacific Avenue the 24-hour noise limits
are complied with, and this compliance is achieved with no additional noise control measures required.


Plant Noise

Three new air conditioning units are proposed for the new second floor of Block C – Daikin model
RXF35WVMA with a sound power level of 60 dB(A) for cooling and 61 dB(A) for heating, L WAeq,T.
These air conditioning units are to be located as per Figure 6. The top of these units is 550mm above
ground level.

The closest adjoining residence to these ground level air conditioning units is to the north-west, and at
this residence the noise of the three air conditioning units combined would be:

    •    61 dB(A) + 4.8 (all three air conditioning units operating) – 22 (5m distance noise reduction) –
         10 (intervening 1.8m high acoustic barrier) + 3 (reflected noise) = 36.8 = 37 dB(A) LAeq,adj,T.

The noise level of all three air conditioning units operating on the highest noise level (heating) at the
same time complies with the steady state noise limits at the closest residence to the north-west for the
complete 24-hour day, with no additional noise control measures required.


NOISE CONTROL

The noise level impact calculations detailed in this report assume that there are existing 1.8 metre
high acoustic barriers located as per Figure 2. If any of these acoustic barriers are in a poor state of
repair then to comply with the noise limits for the additional noise sources associated with the addition
of the upper floor for Block C they must be made good. In addition, the acoustic barrier on the north-
eastern boundary needs to be extended to the south-east to overlap with Block A by a minimum 2
metres. This small additional section of acoustic barrier must achieve compliance with the following:

    •    be a minimum 1.8 metres high relative to current ground levels;
    •    be located as per Figure 7;
    •    continuous and gap free;
    •    have a minimum surface area density of 10 kg/m2. Examples of suitable materials of
         construction include, but are not limited to:
             o reinforced concrete;
             o concrete block;
             o brick;
             o hebel panel;
             o sheet metal at least 2 mm thick;
             o minimum 7.5 mm thick fibrous cement sheet;
             o earth mound;
             o lapped timber palings, for example, kiln dried softwood palings at least 19 mm thick
                 and overlapped a minimum 20 mm;
             o any combination of the above.

With the 1.8 metre high acoustic barriers located as per Figure 7 in place, in conjunction with
separation distance and intervening building/s acting as acoustic barriers, all potential noise sources
associated with the proposed addition of a second floor to Block C, three air conditioning units (to


David Moore & Associates Pty Ltd                                         Our reference: R25048/D3966/Rev.draft/23.05.25