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 12 of 29




SOURCE NOISE LEVELS


On-Site Vehicle Noise

From previous noise level measurements conducted by the consultant, typical on-site vehicle noise
levels (time varying noise source) would be:

•   car driving on driveway:          46 dB(A) LAeq,adj,T @ 8 m;
•   car door closing:                 48 dB(A) LAeq,adj,T @ 30 m;
•   car engine starting:              48 dB(A) LAeq,adj,T @ 30 m.


People Laughing and Talking

In the 2018 report the following source noise level was used for people laughing and talking (69
guests):

•   people laughing and talking:               54 dB(A) LAeq,adj,T @ 8 metres.

This is equivalent to a sound power level of 80 dB(A) LWAeq,adj,T.

The current proposal is for the total number of guests to not exceed 80. For the noise of people
laughing and talking the source noise levels can also be based on a paper presented at Acoustics
2011 by Hayne, M.J. titled ‘Prediction of Noise from Small to Medium Sized Crowds’ the applicable
formula for determining patron noise are:

    •    LWAeq = 15log10N + 64 dB(A);
    •    LWAmax = 11log10N + 81 dB(A).

where ‘N’ is the number of patrons.

As none of the external communal areas are changing in physical size so there would still be a similar
number of guests in all of these areas with the same source noise level as included in the 2020 report.
The only potential additional people noise impact with respect to the addition of a second floor to Block
C would be the guests inside these new dorms and guests accessing these dorms via the external
stair and walkway. There is accommodation for up to 24 guests inside the new second floor and there
could be up to an estimated 10 guests at any one time accessing these new dorms via the stairs and
walkway.

In accordance with the above formula the noise levels associated with the additional guests will be:

    •    8 guests inside a dorm:               64 + 15 x log108 = 77.5 dB(A) LWAeq,adj,T. This is equivalent
                                               to 51.5 dB(A) LAeq,adj,T @ 8m;
    •    6 guests on stairs/walkway:           64 + 15 x log106 = 75.7 = 76 dB(A) LWAeq,adj,T. This is
                                               equivalent to 49.7 = 50 dB(A) LAeq,adj,[email protected] primary areas where guests would be laughing and talking would be in the (covered) communal
area adjacent to Pacific Avenue, and the pool and deck adjacent to the pool.

The noise limits for the above noise source, at the adjoining residences to the north-east, are:

         •    daytime:    47 dB(A) LAeq,adj,T;
         •    evening:    47 dB(A) LAeq,adj,T;
         •    night-time: 42 dB(A) LAeq,adj,T.




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