Appendix D Acoustic Report - 14-16 Mary Street, Noosaville - Bounce Hostels 15.6.2018

Visitor Accommodation, Noosaville                                                                                      1142R1-R0


                     Table 6:        Site-Specific Criteria for Refrigeration Plant

                      Period               General Criterion                          Measured    Site-Specific
                                                                                      LA90        Criterion
                      7 am-10 pm           ≤ background LA90 + 5dB(A)                 28 dB       35 + 5 = 40 dB(A)
                      10 pm-7 am           ≤ background LA90 + 3dB(A)                 27 dB       30 + 3 = 33 dB(A)

                     There is no fixed refrigeration equipment associated with the proposal at this
                     stage.

        Vehicle Noise (Car Parks and Driveways)
                     Vehicle noise is generally described in two components for driveways and
                     carparks. The first is from the vehicles being driven to / from carparks, and the
                     second is from engine starts and car door closures. The latter generally produces
                     higher short-duration LAMax noise events. The former tends to be relatively low in
                     sound level, but can be of significantly greater duration, thereby influencing the
                     overall LAeq sound level.
                     Use of the carpark is expected to be generally limited to between 8:00 am and
                     8:00 pm due to the nature of the accommodation on offer and subsequent low
                     private vehicle usage1, therefore only the daytime and evening criteria are
                     applicable.
                     Noise from vehicles on the driveway was modelled as a moving point source,
                     assuming 10 vehicles in a 1-hour period and using a sound power spectrum for
                     light diesel engines at low speeds2, shown in Table 7.
                     Table 7:        Light Diesel Sound Power Spectrum

                                                   1/1 Octave Band Centre Frequency (Hz)
                                    63       125        250        500        1000         2000   4000      8000

                      LwA           65       67         74         82         80           78     77        66

                     Noise from car door closures and engine starts is not expected to produce noise
                     at the adjoining residence due to the carpark being in a basement and therefore
                     enclosed.
                     The noise levels expected from vehicle noise at the nearest residence are shown
                     in Table 8.
                     Table 8:        Predicted Vehicle Noise Levels

                      Receiver                                                LAeq(1 hour), dB         LAmax, dB
                      12 Mary Street                                                  41                  64

                     The predicted noise impact levels indicate that:
                            •   The LAeq(1 hour) will achieve the external noise criteria for the daytime and
                                internal noise criterion for the daytime and evening periods when allowing
                                for a 7 dB(A) reduction (free-field) through open windows.
                            •   The LAMax (as proxy for the LA1(1 hour)) noise levels will achieve the external
                                noise criterion for the daytime and evening. The internal LA1 may be
                                exceeded, however this should be considered in the context of the
                                residence with respect to existing road traffic noise exposure.




                     1 Boune Plan of Management
                     2 Emanuel Hammer, Sebastian Egger, Tina Saurer and Erik Bühlmann, 23rd International

                     Congress on Sound and Vibration (July 2016) “Traffic Noise Modelling at Lower Speeds”

www.roadpro.net.au                                            21 March 2018                                           Page 9 of 11