Accoustic Impact Report MCU12/0012

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 Noosa Quad Bike Tours
 Environmental Noise Level Assessment of Quad Bike Rider Competency Assessment Circuit,
 298 Tablelands Road, Cooran                                                                               Page 3 of 11


 Noise Limits


 At a separation distance of greater than 50 to 100 metres the noise from the quad bikes using the
 test/training circuit would be relatively constant and best described as ’steady state’ noise. For steady
 state or constant noise the most appropriate noise limit is the ’background plus allowance’ criteria,
 which is background plus 5 dB(A) for the daytime, from 0700 to 1800 hours. This noise limit is
 expressed as the average of the maximum source noise levels, adjusted for any tonal and/or
 impulsive components, which is equivalent to the noise level exceeded 10% of the sample duration,
 denoted LA10,T’


 This is the noise limit that has been applied in this report.



 BACKGROUND NOISE LEVEL


 After the noise assessment of the quad bikes, a short ambient noise assessment was conducted, with
 the results detailed in Table 1. Appendix A details the measurement equipment, equipment settings,
 calibration, monitoring location and atmospheric conditions and Appendix B for the complete set of
 results.




                                                   Table 1
Results of Background Noise Level Measurements, 298 Tablelands Road, Cooran, Wednesday 18 April
                                                     2012

                                                   Ambient Noise Level, d8(A)
   Time
                          LAeq                     LA1                      LA10                    LA90

 1030-1040                38.5                     49.1                     40.6                    31.3

 1040-1050                40.2                     48.2                     44.3                    31.7

 1050-1100                41.9                     51.4                     42.9                    35.4

 1100-1110                47.1                     60.2                     46.3                    34.0




 From Table 1,the average background noise level (LA9o,T) is 33 dB(A) and, therefore, the noise limit is
 33 + 5  38 dB(A), with the noise limit expressed as the LA1o,adi,T.
          =




 SOURCE NOISE LEVEL


 With one quad bike using the test/training circuit at a speed representative of a person who has
 previously tidden a quad bike, a noise assessment was conducted at 10 metres from the closest part
 of the circuit. Sound level meter sampling rate was set to 2 second intervals, to ensure that all events
 were measured. Refer Appendix A details the measurement equipment, equipment settings,

 calibration, monitoring location and atmospheric conditions and Appendix B for a complete set of
 results.


 Whilst the quad bikes will all be governed (controlled to a maximum number of revs), a noise
 assessment was also conducted with the quad bike ungoverned to determine any difference in the
 noise level.


 From Appendix B the following noise levels should b           noted:


      .
            quad bike governed, first set of circuits:            63.1 dB(A) LA10,T average;
      .
            quad bike governed, second set of circuits:           64.1 dB(A) LA10,T average;
      .
            quad bike ungoverned, doing circuits:                 62.9 dB(A) LA10,T average.




 David Moore & Associates Ply LId                                         Our reference: R12054/D2670/Rev.0/8.05.2012