Noise Level Assessment Report for Noosa Quad Bike Tours MCU12/0012

Noosa Quad Bike Tours
Environmental Noise Level Assessment of Quad Bike Rider Competency Assessment Circuit,
298 Tablelands Road, Cooran                                                                                         Page 9 of 21




NOISE LEVEL IMPACT



April 2012   -

                Competency Assessment Circuit

From the results of the April 2012 noise level measurements, quad bike noise levels were calculated
to closest residences, with due consideration of separation distance, intervening vegetation and
topography, and 12 quad bikes using the competency assessment circuit simultaneously. These
calculations predicted the following quad bike noise levels (for 12 quad bikes on the competency
assessment circuit) at the closest residential:


         335 Tablelands Road:                   33.2 dB(A) LA1o,adj,T;
         301 Tablelands Road:                   28.2 dB(A) LA1o,adi,T;
         268 Tablelands Road:                   36.2 dB(A) LA1O,adi,T; and
         295 Tablelands Road:                   32.2 dB(A) LA1o,adi,T.


and for four quad bikes on the competency assessment circuit their noise level at the closest
residential would be 4.2 dB(A) less (as per my letter G120921D2670/DJM dated 1 July 2012):


    .    335 Tablelands Road:                   29.0 dB(A) LA1o,adi,T;
         301 Tablelands Road:                   24.0 dB(A) LA1o,adi,T;
    .    268 Tablelands Road:                   32.0 dB(A) LA1o,adi,T; and
    .    295 Tablelands Road:                   28.0 dB(A) LA1O,adj,T.




July 2012   -
              Competency Assessment Circuit

From the July 2012 noise level measurements at the closel:1t residences to the competency
assessment circuit the noise level reduction from 77 dB(A) LAeq,T (and 78 dB(A) LA10,T and 76 dB(A)
LA90,T) at 10 metres from the test noise source were:

     .   268 Tablelands Road:        41.4   -
                                               34.9      =   40.3 dB(A) for the test noise source only. Noise level
                                     reduction    =      76   -
                                                                40.3     =   35.7 dB(A);


     .   295 Tablelands Road:        39.6   -
                                               36.2      =   36.9 dB(A) for the test noise source only. Noise level
                                     reduction       =   76   -
                                                                  36.9   =   39.1 dB(A);


     .   374 Tablelands Road:        could not be determined due to noise level measurement with test
                                     noise source operating was less than the measurement without the
                                     test noise source. Noise level with test noise source was 36.3 dB(A)
                                     LA90 Estimated source noise level alone would be at least 4 dB(A)
                                          T.

                                     less’, namely 32 dB(A), giving a test noise source reduction of at least
                                     76   -
                                            32   =   44 dB(A) (estimated).


 The noise level of one quad bike on the competency assessment circuit was:


                                     66.2 dB(A) LA1O,T + 0 (tonality)                  66.2 dB(A) LA1O,adi,T @ 10 metres;
      .
          experienced rider:                                                       =




      .   in experienced rider:      62.8 dB(A) LA1O,T + 1.1 (tonality)                =   63.9 dB(A) LA1O,adi,T @ 10 metres.


                                                                                                               10m would be:
 For more than one quad bike on the competency assessment circuit the noise level @


      .
          experienced rider:

                 o   one Kymco MXU300 quad bike:                             66.2 dB(A) LA1O,adi,T @ 10m;
                 o   two Kymco MXU300 quad bikes:                            69.2 dB(A) LA1o,adi,T @ 10m;
                 o   three Kymco MXU300 quad bikes:                           71.2 dB(A) LA1o,adi,T @ 10m;

                 o   four Kymco MXU300 quad bikes:                            72.2 dB(A) LA1O,adi,T@ 10m;




                                                                                   Our reference: R12054/D2670/Rev.1/23.07.2012
 David Moore & Associates Pty Ltd